Tag: Earth

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God’s Elevator — The Vortex

God's Elevator — The Vortex
One of my favorite demonstrations as a physics teacher was to put a student on a frictionless stool and spin them around with their legs extended out in front of them. I would then tell them to pull in their legs. When they did that, their angular velocity increased dramatically—they spun faster. We see this when a spinning figure skater pulls in their arms and legs causing a dramatic increase in their rotational speed. This is an excellent demonstration of the conservation of energy and angular momentum. It is also a design feature that enables a wide variety of living things to fly without prohibitive losses of metabolic energy. We call it God’s elevator.

Instead of solids, what happens if the material that is spinning is a fluid – water or air for example. When water goes down the drain in your sink, it picks up speed as it gets near the center. In the very center, there won’t be any motion at all. In a hurricane, warm air is rising in the center, and as air rushes in to replace the rising air, it increases in speed. The center with no air rushing in is the eye of the hurricane, and the maximum velocity is in the wall near the eye.

A less dramatic example of the vortex is the convection cell on a hot summer day. The Sun heats the ground which then heats the air near the ground. The heated air rises, and as it does, the edges of the air are cooled by contact with the colder air around it. This creates a doughnut-shaped thermal vortex that rises to make an invisible, energy-saving elevator for any organism that can get into the doughnut. What this means is that an animal like a hawk does not have to beat its wings and spend enormous energy to soar to a high elevation. This is a huge saving in metabolic energy. An amazing number of living organisms use God’s elevator to get high into the sky and travel very long distances.

Charles Darwin, while sailing on the Beagle, noticed a mass of spiderlings 60 miles off the South American coast. These organisms are terrestrial creatures, but they were able to travel enormous distances by using vortices. Moths use vortices to make journeys from where they are to new areas.

Recent studies of birds have shown that the wings of a bird create a vortex system which is like a ladder. There is almost no lift produced by the bird’s wings on their upstroke, but the downstroke creates a vortex. That vortex combines with vortices on the wing tips making a ring. The combination of these ring vortices makes a zigzagging ladder-like system which lifts the bird. This allows the bird to use a smaller amount of energy than if it merely powered itself through the air. That is why the birds in your backyard fly in a zigzag pattern rather than a smooth path.

Blackfly larvae that live on the bottom of a stream position themselves so that water flowing over the bottom of the tube-shaped larva goes faster creating a low pressure rising along their bodies. The resulting vortex brings up food particles along the floor of the stream to the filters that extend out the top of the larva. The number of examples of living things that use vortices to feed or to conserve energy as they travel seems to be endless.

How do these animals know to use the vortex effect? The way they position themselves and how they use the vortices in their environment works to their advantage. God’s elevator is a great testimony to His wisdom of design in the creation. We can know there is a God through the things He has made and how they use things like vortices to survive (Romans 1:20).
–John N. Clayton © 2018

Data from Discover, August 1993 page 81-87.

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Why So Much Stuff in Space?

Why So Much Stuff in Space?
One of the questions people ask about God’s creation is why so much stuff in space? If humans are the focus of God’s creation, why did He create so many planets, galaxies, and stars? If God’s purpose was to have the human race as the battlefield for the struggle between good and evil, surely He didn’t need to create 100 billion other stars in our galaxy and billions of other galaxies.

There are so many assumptions involved in this question that it would take many more pages to explore them all. First, this question assumes that God’s creation of life only happened here. It assumes that there are no other planets anywhere in the creation that have sentient beings living on them. You can argue that forever, but the Bible doesn’t give an answer. The Bible only describes Earth because it presents a message for our planet and its people.

The question also assumes that God only intended for us to live on the surface of this planet. I get letters regularly from people who suggest that we have no business going into outer space because God intends for us to live here and nowhere else. That is a massive assumption, and one that I suggest is misguided. One recent discovery has given another possible answer to why so much stuff in space. Humans are rapidly exploiting the mineral wealth of planet Earth. We know that the Earth contains a finite amount of iron, nickel, cobalt. If we should survive on Earth for much longer than the 21st century, we are going to run out of resources.

Japan’s robotic spacecraft Hayabusa 2 visited asteroid 162173 Ryugu (pictured) in June of 2018. Data from the spacecraft indicates that this asteroid is composed almost entirely of nickel and iron. The spacecraft was returning a sample to Earth for analysis. This asteroid is one kilometer wide, and at the current market value, the iron and nickel in the asteroid are worth over 80 billion dollars. God’s plan for us may be far greater and longer than we realize. Space contains a wealth of mineral resources. God has provided for us in many ways, and we always seem to have just enough of a resource to get us to the next source. We had just enough wood to get us to hydrocarbons, and just enough hydrocarbons to bring us to nuclear and solar power.

Our problem is not resources. Our problem is being able to get along with each other well enough to avoid destroying ourselves. Jesus Christ has the answer to that major issue, but the size of the cosmos merely reflects God’s power and wisdom. As we wonder why so much stuff in space, we have to think of the words of the psalmist, “What is man, that you are mindful of him? And the son of man, that you visit him? For you have made him a little lower than the angels, and have crowned him with glory and honor. You made him to have dominion over the works of your hands; you put all things under his feet” (Psalms 8:4-6).
–John N. Clayton © 2018
For more on asteroid Ryugu click HERE.

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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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Is there Anything God Can’t Do?

Is there Anything God Can't Do?
This October will mark 50 years that I have been doing question/answer sessions in lectureships and answering written questions in correspondence courses and online. One of the favorite questions from skeptics and atheists has to do with what God can or cannot do. Is there anything God can’t do?

If you say that there is something God cannot do, you have a direct conflict with numerous passages in the Bible that indicate nothing is impossible for God. If you say there is nothing God can’t do, you get a response like, “Can God create a rock so big He can’t move it?” There are all kinds of fun responses to that question. Marshall Keeble once said, “Yep, and He can create a bulldozer big enough to do the job.” Marshall was being funny and not proposing a serious answer. Theologians have constructed all kinds of elaborate arguments to respond to the question such as saying God cannot lie etc. The problem, however, is in a fundamental error in understanding.

My favorite analogy offered seriously is to ask the skeptic to draw me a four-sided triangle. It should be evident that the question is flawed. A triangle by definition has three angles and is subtended by three sides. In a Euclidean universe, a four-sided triangle cannot exist. A rock, by definition according to Webster is a mass of stone. If a mass of stone gets too large, it assumes a different name – asteroid, continent, planet, etc. Since God created the cosmos including planetary-sized masses of rock, the question reflects the ignorance of the person who asked the question.

If there were such a thing as a four-sided triangle, God could create it, but we have to throw out the question because it makes no sense to us. The same is true of a stone so big God can’t move it. Is there Anything God Can’t Do? That question is a way of avoiding the truth of what God has done.

I have many people who write me and say, “I don’t want anything to do with the church.” The obvious weasel word here is “church.” Webster has the primary definition of church as a place of worship. The biblical concept of church is very different. It refers to those who are called out of the world – people not a building. Jesus told Peter that He would build His church on what Peter had confessed—that Jesus was the Christ, the Son of the living God. There was no building at that time, nor during the lifetime of the apostles. We don’t try to defend what human-created structures and organizations do. No serious person would reject the church the Bible describes if they really understood it.
–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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‘Oumuamua: Mysterious Space Visitor

'Oumuamua: Mysterious Space Visitor
In October of 2017, astronomer Robert Weryk using a telescope in Hawaii discovered an object careening through our solar system from somewhere in interstellar space. Astronomers assumed it was an asteroid from some other stellar system in our galaxy. UFO promoters saw it as a spaceship from some other star system that was spying on our planet. The name given to it is ‘Oumuamua which is Hawaiian for “scout.”

The object was quite narrow and seem to be less irregular than most asteroids. Closer examination has shown that the surface of the object is a reddish color which is typical of some comets which have a crust covering an icy interior. Its size is approximately 800 by 100 feet (230 by 35 meters).

Studies of the trajectory of ‘Oumuamua show it is tumbling and changing directions in a way that indicates a force other than the Sun’s gravity working on it. Naturally, the UFO promoters were overjoyed saying that this proves that alien spacecraft are all around us, and we just happened to catch this one. The SETI Institute used its powerful Allen Telescope Array to examine the object but detected no radio signals indicating intelligence. The problem with the UFO idea is that the change of direction is much smaller than what rockets on a spacecraft would cause. The overall trajectory of ‘Oumuamua has not changed significantly as it heads out of the solar system. It is traveling to fast for any of our existing spacecraft to reach it, but it will still take 20,000 years to be completely clear of our solar system.

After much study, astronomers concluded that ‘Oumuamua is a comet. When comets get near the Sun, they spew gases from their interior. This jetting of gas always has some effect on the trajectory of the comet. The amount of change in ‘Oumuamua’s trajectory is consistent with the effect of a comet’s gas jets.

As we have emphasized before, the Bible doesn’t say that Earth is the only place in the universe where God chose to create life. At present, however, there is no credible evidence that there is life elsewhere, although microscopic forms may exist on Mars and some moons in our system. The idea of alien visitation is pure speculation with no evidence to support it.

The Lord tells us how to live in another existence. Read 1 Corinthians 15:35-57 to learn more about it. Waiting for an E.T. to come and whisk you away to a heaven is wishful thinking. Waiting for the Lord to come again has much more promise and much more supporting evidence.
–John N. Clayton and Roland Earnst © 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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Why Such a Huge Universe?

Why Such a Huge Universe?
Here are some questions that are often asked by those who are skeptical of the existence of God: Why such a huge universe? How can we believe that a Creator cares about us when we are so insignificant in this vast cosmos? Those questions are worth considering.

There is no doubt that the cosmos is fantastically large. The Hubble Space Telescope aimed at a small area of sky no larger than one-tenth of the diameter of the Moon to take this Hubble eXtreme Deep Field photograph. The few bright spots with points of light radiating are stars. All the rest are galaxies—more than 10,000 of them in this picture! Some of them are as far away as 13 billion light-years, meaning that they were among the first galaxies formed.

If there are 10,000 plus galaxies in this tiny area of sky, that means there are 200 billion galaxies in the visible universe. Each of those galaxies contains an average of 200 billion stars. So why such a huge universe?

There were two critical factors at the beginning of cosmic existence—mass and expansion rate. If the total mass of protons and neutrons had been any less during the first moments of creation, hydrogen would not have fused into any elements heavier than helium. Then the nuclear furnaces of the stars could not have generated the elements carbon, nitrogen, oxygen, phosphorus, sodium, and potassium, which are essential for life. If the mass of protons and neutrons had been any greater at the cosmic creation, all of the original hydrogen would have fused into heavier elements like iron, and life would not have been possible.

The mass also affects the expansion rate. If the cosmic mass density had been less, the expansion rate would have been too fast to form stars like the Sun and planets like Earth. If the density had been greater, the expansion rate would have slower and all stars would have been much more massive than the Sun and would give off radiation too intense for any orbiting planets to sustain life.

In other words, the universe was fine-tuned from the moment it began! Why such a huge universe? Because it had to be. It has just the right mass and expansion rate for us to be here. We don’t think that was an accident. Through the study of astronomy and astrophysics, we can see HOW God created the universe we live in, and HOW He made it possible for us to live in it. The creation of the universe is not magic. It’s a feat of astounding engineering from the very moment of creation.
–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.