Tag: nature

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Walnut Sphinx Accordion Worm

Walnut Sphinx Adult Form
One of the amazing things that we see in the natural world is that animals are designed so that they do not get wiped out by predators. A classic example is a caterpillar, which has no easy defense against birds who can find them even though camouflage is one of their primary defenses. The North American walnut sphinx moth caterpillar employs an unusual defense mechanism that gives it the nickname accordion worm.

This caterpillar is about two inches long and has air holes in its sides. It can compress its body to force air out through the holes. The accordion worm does this when threatened by a bird predator. The holes are spaced and designed so that the air passing through them sounds like the alarm calls of the particular bird species that threatens them. The whistle is not just a little squeak. The sound level is more than 80 decibels compared to a normal conversation which is around 50 to 60 decibels. When the caterpillar makes the sound, the birds that would eat the caterpillar scramble out of the area. Researchers from the University of Washington tell us that this is the first incidence of a deceptive alarm call between an insect and a bird.

God provides for all of life on our planet, and the complexity of keeping things in balance is remarkable. As we see the balance of nature becoming upset by human actions, we have to be impressed with what a delicate system of life the Earth contains. Romans 1:18 tells us that we can know God exists through the things He has made. Proverbs 8:1-6, 22-31 reminds us that wisdom has been a part of God’s creative process from the beginning.

If the accordion worm could not survive, it would not become the beautiful North American walnut sphinx moth in the picture. More and more we realize how important it is to take care of what God has created for us.
–John N. Clayton © 2018
Data from “News of the Wild” in National Wildlife, Summer 2018.

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Why Are Plants Green?

Why Are Plants Green?
Why are plants green? The answer to this is some pretty basic physics.

The colors of light that we receive from the Sun have different energies. Red is the lowest of these energies followed by yellow, green, and blue. The sunlight with the highest energy that actually reaches the surface of the Earth is green. Blue light, which is more energetic, is refracted away by Earth’s atmosphere and scattered as it interacts with molecules in our upper atmosphere. That’s why the sky is blue.

When you look at an object, the color you see is the color reflected by that object. A red ball is red because it reflects red and absorbs all other colors. A green leaf is green because it reflects green and absorbs all other colors. If the highest energy of light reaching the surface of the Earth is green, and if the leaf reflects green, what does this do for the leaf? The answer should be pretty obvious – it keeps the leaf from absorbing too much energy and getting cooked. In the fall of the year when the leaves lose their chlorophyll A, which gives them the green color, what happens? The leaf gets cooked, falls off the tree, and we have to scrape it off the yard.

If a planet had a different atmosphere so that a different energy of light reached its surface, its plants would have to be a different color. To quote Kermit the Frog “It’s not easy being green.” Why are plants green? They are green because green is essential to life on Earth.

This explanation is greatly oversimplified. Obviously, not all plants have green leaves. Some plants live under a canopy of other trees and have to use a different system. The design of life on Earth is incredible, and the green trees and grass around us testify to the wisdom of God in making a place for life to exist.

We have a children’s book titled Why Is the Sky Blue, Why Is the Grass Green. You can read it and all of our children’s books on our Grandpa John’s Science Club site using THIS LINK.
–John N. Clayton © 2018

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Blaming California Wildfires on God

Blaming California Wildfires on God
I am writing this article near Redding, California. We have been involved in lectureships in California during this month of August 2018. The fires that are burning in this state have been a constant source of inconvenience for us. They are a major tragedy for people here who have lost homes, businesses, and health. Smoke makes travel difficult, but for people with respiratory problems, the smoke can be lethal. Over and over we have heard references to “why did God do this to us” or in other cases “thank God for…” While we understand the emotions that go with all that is happening, we need to stop blaming California wildfires on God.

While working in California, we are blessed to be with Keith Crummer. Keith has been an ecosystem manager and forest management expert in California for over 30 years. He has degrees in forest management from the University of California at Berkeley and from Oregon State. As we discussed the incredible damage of this current series of fires, Crummer just shook his head in sadness. He told us that what is happening in California was caused by human ignorance and mismanagement.

One fact that astounded me is that there are more trees in the United States now than have ever existed in the history of this area. Before the white man arrived on the scene, trees grew and died just as they do today. When the biomass accumulated on the forest floor, small fires set by lightning or by spontaneous combustion eliminated it. Those fires wiped out small trees and allowed grasses to flourish which in turn supported deer, elk, and other mammals. That made the forest less dense. While fires existed, they were small fires that ran out of fuel very quickly.

Then humans moved in and stopped the fires and allowed vast amounts of biomass to accumulate on the forest floor. The trees became so dense that grass could not grow. Crummer said that scientists know that managing the forest involves harvesting the material that falls to the forest floor, thinning the trees, and using the energy that is available from them. This would eliminate the potential for uncontrolled burning because massive amounts of fuel would not be available. It would also allow animals like deer and elk to proliferate. The current fire catastrophe is 100% due to the mismanagement of the environment by people who thought they were doing the right thing by eliminating fires and refusing to allow cutting down trees or removing brush.

In the Genesis account, God told the first humans to “…fill the earth and subdue it, and have dominion over the fish of the sea and over the birds of heaven and over every living thing that moves on the earth” ( Genesis 1:28-30). “The Lord God took man and put him in the garden to work it and keep it…” (Genesis 2:15-16).

God did not tell them to merely preserve the creation. The creation is a living, changing, dynamic entity. It is our job to facilitate the changing Earth. Working and keeping the Earth means to control those things that would destroy what God created including the animals that live on it. We need to stop blaming California wildfires on God. After the fires in Yellowstone National Park, the elk and deer populations returned to levels close to what they were before humans arrived. If we had done what God commanded in Genesis and worked the forests of the western states, the fires today would not be spreading as they are.

So God did not “do it” to those who lost homes. We understand the anguish and desperation that our friends have experienced, but instead of blaming California wildfires on God we need to realize that politicians and bureaucrats have mismanaged the wonderful resources God has given us. Environmental extremists need to understand more fully what must be done to preserve and protect the environment for the benefit of future generations. Followers of Jesus Christ need to let those who are suffering know that we want to help them. God is not the cause of their burden, but He wants to send His people to love and support those who are suffering.
–John N. Clayton © 2018

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Perseid Meteor Shower Peaks

Perseid Meteor Shower Peaks
In our post yesterday we mentioned that the Perseid meteor shower peaks tonight and tomorrow night August 11-12 and 12-13. Earth is making its annual journey through the trail of debris left by Comet Swift-Tuttle. When those pieces of rock, mostly ranging in size from a grain of sand to pea-sized, enter Earth’s atmosphere at supersonic speeds, they burn up from the heat of friction. We see the streaks as “shooting stars.”

Earth has been passing through the Swift-Tuttle debris since July 17 and will not be clear of it until August 24. So even though the Perseid meteor shower peaks this weekend, it is possible that you might see some of the meteors over the next few days. However, on these two nights, they should be visible at the rate of about one per minute. The best time to see them is after the Moon sets, and the best place is an area free of lights and with an open sky.

Every day anywhere from 100 tons to 1,000 tons of meteoritic material enters the Earth’s atmosphere. This material can come from comets or asteroids. The asteroid 3200 Phaethon produces the Geminid meteor shower in mid-December. There are other pieces of rock, dust, and debris in space that sometimes get trapped in the Earth’s gravitational field, and contribute to the hundreds of tons of material that reach Earth every day.

So what are the lessons we get from all of this? For one thing, Earth is not a static planet. It is gaining new mineral wealth every day. Our planet is vibrant and alive and has changed over the eons of its existence. The design of Earth’s defensive shield is incredible. With all of this material left over from the creation processes, it is critical that we have an atmosphere that is dense enough to burn up the space junk that comes toward us.

Every time scientists get a meteor sample we learn more about our neighbors in space. We knew a lot about the makeup of asteroids before science actually landed a spacecraft on one. Our knowledge of comets was advanced before we were able to leave Earth’s gravity and examine one up close. We continue to learn about the unique nature of the Earth, the Moon, the Sun, and the material that makes up our solar system.

While you are outside, take a look at Mars which is still closer and brighter than usual and visible until about 4 AM local time. Saturn will be visible until 2 AM. Venus will set about 9:30 PM and Jupiter at 11 PM. The planets travel near the ecliptic, the path of the Sun and Moon across the sky, so here’s your chance to enjoy them all. As the Perseid meteor shower peaks, it reminds us of the words of the psalmist: “The heavens declare the glory of God; the skies proclaim the work of his hands” (Psalms 19:1).
–John N. Clayton and Roland Earnst © 2018

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Perseid Meteor Shower

Perseid Meteor Shower
One of the most spectacular meteor showers of the year will reach its peak on the nights of August 11-12 and 12-13. This year’s Perseids will be exceptionally brilliant because the moon will be only a small crescent and will set early. You can best see the Perseid meteor shower after 12:00 AM local time.

The Perseids are interesting because they frequently feature a brilliant fireball which can actually cast a shadow or a bolide which is a meteor that explodes. The Perseid meteor shower gets its name from the fact that the meteors appear to come from the direction of the constellation Perseus which will be in the northeast for those of us looking up from the United States. However, you will see them streaking in any area of the sky.

The Perseid meteor shower is debris from the Comet Swift-Tuttle which was discovered in 1862 and returned most recently in November of 1992. These meteors are small particles usually no larger than a pea and as small as a grain of sand. They become visible at an altitude of 55 miles (88 k) where they enter the atmosphere with an average velocity of about 133,200 miles (214,365 km) per hour. Perseid meteors usually burn up by the time they reach an altitude of 50 miles (80 km) and never contact the surface of the earth. If they did, they would be called meteorites.

So, if you can, find a place away from city lights after midnight. Lean back in a lounge chair where you can see the expanse of the sky. The best viewing is with your unaided eyes. Binoculars or a telescope will not allow you to view the whole sky. Then just enjoy the beauty of God’s creation. We will have more on the Perseid meteor shower in our post tomorrow.
–John N. Clayton and Roland Earnst © 2018

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Biomass on Earth Measured

Biomass on Earth Mostly Plants
Biomass is the mass of living biological organisms. If you lumped all living things by category, what group of organisms do you think would have the greatest biomass on Earth? We aren’t talking about the number of individuals, but the mass of the different lifeforms.

The Proceedings of the National Academy of Sciences on May 21 published a study of the different areas of the world and what form of life dominates in those areas. (Click Here to read the full report.) Plants contribute the primary biomass in the terrestrial environment. Animals are primary in the marine environment. Bacteria and archaea (single-celled microorganisms) dominate the deep subsurface environment.

You may find the results surprising. The total biomass of Earth consists of 80% plants. Bacteria make up the second largest biomass at 15%. After that in descending order are fungi, archaea, protists (unicellular organisms that sometimes form colonies), animals (including humans), and viruses. Soil fungi, protists, soil archaea, arthropods, annelids, and livestock all exceed humans in their biomass. Only wild mammals, nematodes, and wild birds have smaller biomasses than humans. In the marine environment the biomass is much smaller than on land, and after animals, the greatest biomass is in protists, archaea, fungi, and finally bacteria. It is interesting that tiny Antarctic krill contribute about the same biomass as humans.

As you think about the biomass on Earth, it becomes evident that for human life to exist, we need a huge biomass of supporting life-forms. It becomes apparent that we must take care of all of the living things that support us. It is also obvious that before human life could exist on Earth enormous preparation was required.

We have to be reminded of the words of the psalmist in Psalms 8: “When I consider your heavens, the work of your fingers, the moon, the stars, which you have set in place, what is man that you are mindful of him, the son of man that you care for him… You have made him ruler over the works of your hands; you put everything under his feet: all flocks and herds, and the beast of the field, the birds of the air, and the fish of the sea, all that swim the paths of the sea.”
–John N. Clayton and Roland Earnst © 2018

Reference: Scientific American, August 2018, page 16.

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Science Shows Intelligent Design

Science Shows Intelligent Design
In attempting to discredit all evidence that God created the universe, many atheist periodicals try to paint all religious claims with the same brush. In truth, believers cover a wide range of viewpoints. There are those who reject science altogether, others who accept “theistic evolution,” and still others who see that science shows intelligent design in the universe and living things. It is not a question of intelligent design or science. Science shows intelligent design.

Some creationists vilify science and make God an illusionist who does magic tricks to produce what we see in the world around us. In their minds “God spoke it into existence” puts God in the role of not using natural processes. It also makes God deliberately deceptive. Both of those views conflict with the Bible. Genesis 2:8 says, “The Lord God planted a garden eastward in Eden.” Don’t you think that God used processes to plant the garden? He didn’t run a rototiller or spade up the ground, but he “planted” using a process. When Genesis 1:3 tells us “God said Let there be light, and there was light,” is the light coming from his voice as He speaks or did He use a process? In Proverbs 8, wisdom speaks calling us to have an understanding heart (verse 5) and saying that wisdom was with God in His creative processes (verses 22-30).

The Bible maintains that God in all of His creative activity did so with wisdom and purpose. Webster’s Dictionary defines science as “systematic knowledge.” Scientists seek to gain information about the world in which we live. This information is not just data, but it is also information about processes. None of this precludes God from “speaking it into existence.” We are simply learning how what God spoke became a reality. That is why we see passages like Psalms 19:1, “The heavens declare the glory of God; and the firmament shows his handiwork.” The creation process is an apologetic evidence for the existence of God as Romans 1:20 tells us, “For since the creation of the world God’s invisible qualities—his eternal power and divine nature—have been clearly seen, being understood from what has been made.”

Quantum mechanics is showing us a whole new concept of science. We now understand that the sub-microscopic world of atoms and electrons, quarks and mesons does not operate by the same rules as our world of planets and moons and animals. Quantum concepts such as simultaneity and duality tell us that the creation is more complex and amazing than we ever imagined. Concepts like string theory propose as many as eleven spacial dimensions involved in the production of the physical world. The definition of God requires an entity that is outside of space and time—in other words, in a dimension higher than our own. To believe that there is an intelligence involved in all of this is a faith issue, but believing that somehow it all happened by chance is also a faith issue.

Intelligent design does not negate science. Whenever we see evolutionary processes shaping and molding living things, it is evident that the design of plants and animals allows these changes to take place. Seeing intelligence in the design of the universe is not an attempt to discredit science. Science shows intelligent design. Faith in God allows us to recognize a personal cause for the creation around us as opposed to relegating the cause to mechanical accidents. Faith in God also gives us the ability to see a purpose for our own existence and the reason that there is something instead of nothing.
–John N. Clayton © 2018

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Should Christians Care About Global Warming?

Should Christians Care About Global Warming?
Global warming has been an issue from a scientific perspective for at least 60 years. I remember discussions about it in my college classes at Indiana University many decades ago. In the last decade it has become a political issue and in the last few years a religious issue. There is so much bad information in the media that it is no wonder many people are confused about what is true and what is not true. Should Christians care about global warming?

Let us first point out that global warming and local heat are two different things. The heat wave that you may have experienced in the summer of 2018 in the United States is NOT what global warming is about. It may be hot where you are and very cold somewhere else. Global warming is just that–global. Data shows that the average temperature of the entire planet is rising. This is not the first time it has happened. The history of the planet shows periods of global cold and global heat. The causes of these changes are many and complex. Earth is a large planet with multiple factors involved in how its climatic systems work. Variations in the sun, volcanic eruptions, asteroid and comet collisions, and human activity all can affect climate.

Does climate affect human life? Of course it does. It always has, and with our increased population the effect will be greater. Jesus told his disciples, “You will hear of wars and rumors of wars: see and do not be alarmed for all these things will come to pass but the end is still to come. For nation will rise against nation, and kingdom against kingdom and there shall be famines and earthquakes in different parts of the world” (Matthew 24:6-7).

Is human life affecting climate and should Christians care about global warming? Genesis 2:15 tells us that God put humans in the garden of Eden “to dress it and keep it.” God expects us to take care of what He created, and we have not done a good job of it. When we mismanage God’s gift to us, there are always consequences. Man-made synthetics cause a large percentage of cancer. We are in an opioid crisis because of materials we take into our bodies that affect us in a variety of ways. Those of us who live in industrialized areas have seen the ecological disasters caused by human greed and selfishness. Several years ago, the Cuyahoga River in Ohio actually caught on fire. I have seen areas like Ducktown, Tennessee, and Sudbury, Ontario, decimated by pollution. Fortunately, people worked to clean up those places. Right now we have a crisis in our oceans because of the foolish disposal of plastics.

The global warming issue involves many factors, and human actions are certainly some of them. To what extent humans are responsible can be debated, but the question of rising temperatures globally cannot be debated. Christians can lead the world in helping relieve the consequences of “famines and earthquakes in different parts of the world.” If your belief system is “survival of the fittest,” you will not get involved, but that is not the worldview of Christians.

Jesus said, “Then shall the King say … Come you blessed of my Father, inherit the kingdom prepared for you from the foundation of the world: For I was hungered and you gave me food to eat: I was thirsty and you gave me something to drink: I was a stranger and you took me in: naked and you clothed me: I was sick and you visited me…” (Matthew 25:34-38). Global warming may cause much suffering on our planet, whatever its cause. Should Christians care about global warming? Yes, and the followers of Jesus Christ will be there to relieve the pain.
–John N. Clayton © 2018

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Optimum Martian Viewing

Optimum Martian Viewing
Recently there has been much talk about Mars in the media. NASA and private firms such as Elon Musk’s SpaceX are working on plans to send people to Mars and eventually build a colony there. For the past month, a planet-wide dust storm has blocked sunlight from reaching the planet’ surface and caused NASA’s solar-powered Opportunity rover to shut down. In addition, Mars is now in “opposition” to Earth and at its closest point to us since 2003. The current position of Mars gives us optimum Martian viewing.

When astronomers say that Mars is in perihelic opposition to Earth, that means the Sun, Earth, and Mars are in a line with Earth in the middle. That makes the apparent luminosity of Mars the brightest that it is at any time. Also, it means that Mars rises each night as the Sun sets and Mars sets each morning as the Sun rises. So Mars is visible in the sky all night long, and it is two times brighter than Jupiter, which usually outshines it. In addition to Mars, Saturn, Jupiter, and Venus are also visible at this time in an east-west arc across the sky after sunset. You can distinguish Mars by its red color, and it will continue to be bright through August for the optimum Martian viewing opportunity.

On July 26, NASA announced, “It’s the beginning of the end for the planet-encircling dust storm on Mars.” However, it may be weeks or even months before the Martian atmosphere clears enough for the Opportunity to have enough sunlight to recharge its batteries and return to life. NASA hopes that the batteries will recharge before Opportunity freezes to death. The average temperature on Mars is minus 80 degrees Fahrenheit (minus 60 Celsius). That is not very hospitable to machinery, or humans.

In addition to the previous factors, Mars will be at its closest point to Earth today, July 31, 2018. It will be only 35.8 million miles (57.6 million km) away from us. Mars is at its closest point about every two years. When Mars is on the other side of the Sun, it is about 250 million miles (401 million km) away. For that reason, any mission to Mars will have to be precisely timed to reach our neighboring planet in the shortest time, but it will still take months to make the journey.

With all of the challenges of reaching and perhaps colonizing Mars, the work goes on to achieve that goal. Some, such as Elon Musk, are suggesting “terraforming” Mars. That is, modifying the climate to make it hospitable to earthlings. That would require raising the climate temperature, thickening the thin atmosphere, and having a stable supply of liquid water, among other things. Elon Musk suggested a method of doing that which involves bombing the polar ice caps with explosives. It sounds like science fiction, and a new report from two leading scientists, Bruce Jakosky of NASA and Christopher Edwards of Northern Arizona University suggest that it is. Their study published in Nature Astronomy concludes that “with current technology, we just don’t see that there are any viable options” for terraforming Mars.

What we need to remember as we consider all of this, is that God has given us a planet that has all of the right conditions for us to live on and enjoy. He has already “terraformed” it for us, and we need to protect that gift and use it wisely. In the meantime, we can enjoy the optimum Martian viewing opportunity He provided for us to see the “red planet” right now.
–Roland Earnst © 2018

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Liem’s Paradox and God’s Design

Liem's Paradox and God's Design
People who believe in naturalism face some interesting problems. One of them is the fact that what evolution predicts should happen doesn’t always happen. This phenomenon is known as Liem’s paradox. Let me explain it.

I am reminded of a field trip to the Shedd Aquarium in Chicago when I was in a teacher-training program sponsored by the National Science Foundation. The leader gave us a demonstration of natural selection that was so easy to understand that it could we could use it in teaching low-level biology students the basics of evolution. Three small fish were introduced into a tank containing a northern pike that had not eaten for several days. One was very healthy, one was slightly impaired with several fins missing, and one was severely impaired with most of its fins missing.

We were asked to predict what the pike would do. We all agreed the pike would eat the impaired fish immediately and then the slightly impaired fish and the healthy fish would probably not be eaten. What happened was that the pike chased the healthy fish around and around the tank as we watched for over an hour. The pike never could catch the healthy fish and never ate the other two. There were all kinds of theoretical explanations for what we observed.

Animals are adapted to eat certain foods. Dr. Karel Liem of Harvard University did a study of a fish in Mexico called Minckley’s cichlid. Those fish have highly specialized pebblelike teeth which are perfect for eating the hard-shell snails that are plentiful in their native environment. What Liem discovered was that these fish would swim right past the snails if they could find softer food. They seemed to avoid the food that their bodies had become adapted to eating.

This evolutionary paradox is called Liem’s paradox, and it is seen over and over in nature. Gorillas will walk miles past copious supplies of stems and leaves which is their typical diet, to get soft sugary fruits that are harder to reach and require long walks. Gorillas in captivity will avoid fibrous foods like celery if they are offered sugary, fleshy fruits, even though those fruits are harder to digest and not good for them.

Liem’s paradox is not hard to understand if we believe that God designed animals to live in specific habitats. The design of animals is always to meet the most austere conditions in their environments. In the case of Minckley’s cichlid the fish will always have the snails to fall back on in hard times, but by being diverse in their diet, they save the snails for times when food is not readily available.

In Uganda’s Kibale National Park there are two different species of monkeys–the mangabey monkeys and the red-tailed guenon monkeys. The mangabey monkeys have flat, thickly enameled molars that allow them to crush hard, brittle foods. The red-tailed guenon monkeys have thinner teeth but have come to share the environment with the mangabey monkeys. Both species of monkeys eat the soft fruits and fleshy young leaves that are around them. In 1997 there was a severe drought, and the soft fruit and leaves were no longer available. The mangabey monkeys survived because they could crack seeds and get at hard foodstuffs which they did not eat until they had to. Animals are designed to get through the hard times but will pass up their special adaptions designed for survival so they can eat preferred foods.

We humans do the same thing. There are times when we eat something we may not like in order to survive, but unlike most animals, our bodies are designed to eat just about anything. We need to remember, “I will praise thee, Lord, for I am fearfully and wonderfully made” (Psalms 139:14) when we look at the diversity of stuff to eat in our local supermarket. We are reminded that Liem’s Paradox is only a paradox to those who are committed to naturalism.
–John N. Clayton © 2018