science Archives

January 10, 2023January 9, 2023

Polar Bear Paws on Ice

If you have watched Arctic nature documentaries, you may have noticed that polar bears pursuing their prey can travel at impressive speeds and make rapid turns on snow and ice. A recent study of polar bear paws comparing them to brown bears, American black bears, and sun bears reveals how they can stop quickly on the ice.

Polar bears have more foot fur and smaller paw pads than other bears. The paw pads have microscopic bumps called papillae which are as much as 1.5 times longer than those of other bears. Friction experiments show that the taller papillae increase the surface area in contact with the ground giving more traction on slippery surfaces. The smaller size also reduces heat loss through the paws. When we were in Alaska, I learned that native Americans living there for generations could tell the color of the bear by looking at its paw prints in the snow or mud.

The polar bear is not just a brown bear with a white coat. There are design features in polar bears that equip them to live in an ice and snow environment. The design of polar bear paws is only one of the features allowing them to survive in an environment where no other bear could. Sun bears don’t have papillae at all because they would be useless in the bears’ tropical habitat.

The more we study the design of animals, the more examples we see of specialized equipment enabling life to survive everywhere on Earth. These examples remind us that “we can know there is a God through the things He has made” (Romans 1:20).

Rerence: American Scientist magazine for January/February 2023 page 15, or americanscientist.org

January 9, 2023January 8, 2023

Global Biomass and Human Responsibility

You may be surprised to know that the total biomass of bacteria in the ground is 1000 times more than the mass of humans. Mass is the total number of molecules present, and we usually measure it by weight, which is the pull of gravity on the molecules. For example, the mass of living things in the ocean equals 100 times the mass of all humans on planet Earth. In other words, if you totaled the quantity of matter in whales, fish, corals, clams, etc., you would have 100 times more molecules than in all living humans. If you counted the number of individual life forms in the oceans, the ratio would be even greater than 100-to-one, but that is quantity, and we are talking about global biomass.

Not only is the mass of underground bacteria greater than that of humans, but even worms have three times our mass. Even more surprising, the mass of viruses on Earth exceeds human mass by more than three times, and the global biomass of all bacteria is more than 1100 times that of all humans. There are some important messages in these numbers. One is that we must understand that we can’t eliminate viruses or bacteria in the world. Furthermore, we wouldn’t want to. Bacteria and viruses are essential in sustaining all other forms of life.

Another thing we need to consider is that humans keep (as livestock, poultry, and pets) a third of all mammal biomass on the planet and two-thirds of all bird mass. In Genesis 1:28, God gave humans the responsibility of managing all living things. We are now beginning to understand the importance of the conservation and management of life on our planet.

The global biomass of plants is another area where we have had a poor understanding. The mass of all plants is 7500 times greater than human mass, and like bacteria and viruses, plants are essential to life on our planet. Human destruction of forests worldwide and the replacement of vegetation with concrete are major factors in pollution and climate change.

The Genesis account says, “I give you every seed-bearing plant on the face of the whole earth, and every tree that has fruit with seed in it. They will be yours for food. And to all the beasts of the earth and all the birds of the air and all the creatures that move on the ground – everything that has the breath of life in it – I give every green plant for food” (Genesis 1:29-30). Earth’s design is no accident. The role of plants, bacteria, worms, viruses, and all life is a product of an infinitely intelligent and understanding mind.

The dictionary definition of “science” is “knowledge,” and it can never conflict with the mind that created all we see and are. When God challenges us to consider the wisdom in the creation, the human response is like Job’s, “Surely I spoke of things I did not understand, things too wonderful for me to know” (Job 42:3). We know a lot more than Job did, but, like him, there is much we don’t know.

Reference: “The Biomass Distribution on Earth” in Proceedings of the National Academy of Sciences (PNAS) May 21, 2018

January 6, 2023January 4, 2023

Orphan Crops to Provide Food

According to the National Science Foundation (NSF), more than 34 million people in the United States do not have enough food to eat. The NSF is funding research into orphan crops to provide food.

The groundcherry is a member of the nightshade family of flowering plants that includes tomatoes, potatoes, eggplants, and bell peppers. Although its relatives are important crop plants, groundcherries are called “orphan crops” because they grow wild and have no agricultural value. Groundcherries are common all over America, are easy to grow, and can be modified genetically. They have a papery, balloon-like husk or inflated calyx surrounding the berries.

Using the CRISPR genome editing tool, researchers funded by the NSF are working to modify groundcherries and other orphan crops to provide food. Zachary Lippman and Jia He of the Cold Spring Harbor Laboratory feel that the groundcherry has a significant untapped potential to make it useful as a food for humans. They hope their research will lead to new food sources from various plants to build and advance a bioeconomy that will eliminate hunger on our planet.

Understanding the design of a plant that might have been considered unusable or even toxic in the past can lead to a new food source. In the distant past, people thought tomatoes to be toxic. We may find ways to use other orphan crops to provide food. Many familiar plants may have the potential to strengthen food supplies.

God gave us plants to directly or indirectly provide food for all of us. However, we have much to learn about God’s design in the plant kingdom, and we have only scratched the surface.

Reference: National Science Foundation Research News for November 30, 2022.

January 5, 2023January 4, 2023

Survival Requires Change

We are entering an interesting time of change for living plants and animals on planet Earth. We are in a period of rapid climate change, and for many living things, survival requires change. However, for some life forms, this is not an issue. For example, omnivores, animals that eat a wide variety of foods, can change their diet to whatever is available. For example, bears in Alaska eat salmon, but if that is not available, they eat insects, nuts, plants, rodents, and marine shore life such as clams.

For other animals, the situation is much more complicated. For example, giant pandas rely on bamboo for food. Not only is their digestive system designed to eat only bamboo, but even their hands and fingers are designed to modify the bamboo so they can eat it. Polar bears rely on ice flows to get the seals that make up most of their diet. With much of the ice in polar areas melting, the bears cannot secure food, and starvation threatens many of them.

Survival requires change, and for some animals, that means migrating to a different place where they can find their dietary needs. As the oceans warm, cold-water fish migrate to northern areas. Some corals are establishing new colonies in different places as conditions where they have lived for centuries no longer meet their needs. On the other hand, animals with specialized equipment, such as pandas, will face extinction. Humans can step in with temporary solutions, but eventually, some forms of life will cease to exist. That is not necessarily a bad thing.

The fossil record shows us that survival requires change. A significant change in the climate caused the extinction of the dinosaurs. However, that eventually provided a climate and atmosphere where humans and the animals we depend on could thrive. Asteroid material did not directly destroy the dinosaurs, but the asteroid collision changed the climate. That change produced an environment in which dinosaurs could not survive, but it led to the formation of a climate ideal for humans.

Genesis 1:2 is an interesting passage. A possible translation of the verse is, “And the earth became wasted and emptied, and darkness was upon the face of the deep place.” That would indicate a change in Earth’s condition. God has used such changes to accomplish His will. The flood of Noah was not primarily an environmental act but a response by God to the sinfulness of humans at that time. Climatic change is another tool God has used in the past. In geologic time, there have been periods of hot and cold, and survival requires change. The current change in Earth’s climate is not solely caused by humans. We may contribute to the process, but humans are not the sole cause.

God’s creative processes don’t involve “magic tricks.” Instead, God uses natural methods to shape and mold planet Earth. Some animals, such as dinosaurs, have played essential roles in contributing to the resources that humans would need. When they had completed their mission, a change brought about their extinction. The Bible doesn’t tell us how God did what He did, but the more we study the creation, the more we understand some of His processes. Climate change has been one of them and may be so again.

January 4, 2023January 3, 2023

How Frogs Swallow Their Prey

Most of us know that frogs extend their tongues which stick to their prey, and then draw it back into their mouths. High-speed videos show that frogs unroll their tongues like party horns and wrap their targets in an adhesive hug. What science has not understood is how frogs swallow. What happens when they close their mouths? Rachel Keeffe is a National Science Foundation Graduate Research Fellow who has released a study showing how frogs process whatever their tongues bring into their mouths.

Keeffe and her colleagues attached metallic beads at various points in the mouths of cane toads, among the largest frog species. They wanted to study what happens to food once it is in the frog’s mouth. There is a very complex system of cartilage and muscles traveling so far down the frog’s throat that it butts up against the heart. Once there, chemicals secreted in a stomach-like chamber digest it, bringing the nutrients into the frog’s vascular system.

When we examine how frogs swallow, we see that even the simplest life forms have highly complex systems. Frogs control insects and other forms of life that threaten humans. In turn, a variety of birds and fish eat frogs. The world around us speaks volumes of God’s wisdom and design, allowing life to exist on Earth. Romans 1:20 tells us that we can know there is a God through the things He has made. We see that again in the design of how frogs swallow.

Reference: NSF.gov

December 30, 2022December 30, 2022

The Appearance of Design

Look around, and you will see amazing things in the natural world that give the appearance of design. Atheist evolutionary biologist Richard Dawkins has said that biology is the study of things that give the appearance of having been designed. But, of course, he does not believe they were designed because he does not believe in a designer. Is he correct, or is there a better explanation for the appearance of design? Here are some links to past articles in which we have dealt with that topic:

The Problem of Beauty

Is Design in Nature an Illusion?

Designing a Planet to Support Life

Marvels of Engineering in Nature

Designed with Purpose and Beauty

What Design Looks Like

Does Intelligent Design Destroy Science?

Those are just a few of the past articles on design that show evidence for a Designer. We believe that God has given us two revelations of Himself. One is His creation, and the other is His written word. The authority of the Bible is another subject we have dealt with often. Tomorrow, we will share some links from past articles on that topic.

December 23, 2022December 19, 2022

Unstable Wing Design Is Essential

“How do birds fly?” is a very old question that remains basically unanswered. We aren’t talking about simple fixed-wing flight, which uses the old physics model that a rapidly moving fluid exerts minimum pressure at a right angle to the direction of motion. We use that model for airplanes, but birds have another feature called unstable wing design. The unanswered question about bird flight is how they can be so agile. Drones have a problem with this issue because, with their fixed-wing structure, they can’t make quick direction changes.

Christina Harvey of the University of California, Davis, and Daniel Inman of the University of Michigan have examined the flight dynamics of 22 bird species. They concluded that unstable wing design is the key to what birds can do. For example, seagulls can change the shape of their wings by adjusting their wrist and elbow joints. Changing their wing shape allows them to handle wind gusts easily. Aerospace engineers have not been able to duplicate that part of flight dynamics, but most bird species manage it quite well.

Drones working in an urban environment must handle sudden wind gusts and rapid direction changes, but with a fixed-wing design, that is almost impossible. The study’s authors point out that future business-level drones or personal aircraft must be able to implement unstable wing design. However, engineers have yet to find a way to do that. Researchers funded by the National Science Foundation (NSF) and the National Academy of Science (NAS) are working to understand how the complex design of bird wings allows unstable flight.

It is fascinating that the earliest birds of flight seen in the fossil record had a wing design that allowed unstable flight. We even find fossil birds that resemble our modern hummingbirds, which have very unstable wing design. We continue to see examples of intelligence in the design of living things. Much of what you and I enjoy, from velcro to rockets and modern aircraft, had their start when thinking people saw the design God built into life and copied it to benefit all of us.

References: The U.S. National Science Foundation (NSF) and the National Academy of Sciences (NAS), in their December 2022 reports,

December 22, 2022December 19, 2022

Drugs and Highway Safety

The National Highway Traffic Safety Administration (NHTSA) released a report on drugs and highway safety (December 2022) showing data from seven level-one trauma centers and four medical centers around the country. Of 7,279 road users tested, 20% of drivers had blood alcohol levels of .08% or higher, exceeding the legal limit in every state. However, they also found that 20% of those tested were positive for two or more drugs, so alcohol was only part of the problem. The studies also found that over 50% of injured pedestrians and just over 43% of injured bicyclists had a drug in their bloodstreams.

In addition to recreational drugs making highways unsafe for all of us, new studies released by the American Lung Association show the effect of long-term marijuana smoking. Data gathered at Ottawa Hospital in Canada show that 93% of older marijuana smokers had developed emphysema. That is higher than the rate in cigarette smokers, which was 67%. However, the data on non-smokers that have come out over the years suggests that emphysema is not a significant concern unless a person is around second-hand smoke.

Addiction to recreational drugs, including alcohol, is not just a problem for the users. Last week, here in Niles, Michigan, a friend was driving on Main Street with her child in a car seat. A person pulled out of the local marijuana distribution shop without looking, hitting, and totaling my friend’s car. I was putting groceries in my car at the local supermarket when a guy drove into the parking lot at high speed, doing wheelies and forcing me and several others to run into the grocery store to avoid being hit. The policeman later told me the driver had just come from the marijuana store and was using the drug as he drove.

This issue goes beyond drugs and highway safety. The further our society goes away from God, the more pain, suffering, disease, and abuse we can expect to see. Christians know that our bodies are the temple of the Holy Spirit (1 Corinthians 3:16), and we should take care of them. Therefore, bringing the gospel of Christ to our society is not just a spiritual issue. It is also a clear road to a better and safer life for all of us.

December 21, 2022December 19, 2022

Alien Minerals and Alien Life

Andrew Locock at the University of Alberta discovered two new minerals in a fragment of the El Ali meteorite that landed in Somalia. These minerals had never been found naturally on Earth, although scientists had synthesized them in a lab. Chris Herd, an Earth and Atmospheric Sciences professor and curator of the University of Alberta’s meteorite collection, named the two alien minerals “Elaliite” and “Elkinstantonite.”

The tabloids try to use this find to suggest that alien worlds exist that are radically different from Earth. The fact is that these minerals contain the common elements iron, potassium, and oxygen. Like many other “alien minerals” such as Brianite, Xifengite, and Heamanite, scientists have synthesized them. Inorganic materials can form new chemical configurations when they are subjected to temperatures and pressures not seen on Earth’s surface. All of these minerals with unfamiliar names are the product of conditions not present on the surface of our planet.

There are chemical restraints on what elements can sustain life. Biologists tell us that life is “that form that can move, breathe. respond to outside stimuli, and reproduce.” The elements that make those functions possible are carbon, hydrogen, oxygen, and nitrogen. For example, living things made of iron are not chemically possible, yet iron is the dominant element in meteorites. Oxygen is the one oxidizing element that allows respiration without adverse chemical reactions that would prevent life from surviving. For that reason, life forms breathing chlorine or bromine are not possible.

At the same time, alien minerals in meteorites do not mean that alien life is impossible. On the contrary, if there is life in space, it will be made of the same elements that we are. It may not look like us or live as we do, but we will not have any trouble identifying it as life.

Every time this issue comes up, it reminds me of my experience on a radio show. I was in Washington, D.C., doing a call-in talk show with Larry King (before he became famous) and a local atheist. We had a lively discussion about science and faith with some references to alien life. A caller said to the atheist, “What would you do if a spaceship landed on the White House Lawn and a little green man jumped out with a Bible in his hand and said, ‘Has Jesus been here yet?’” Before I could point out some problems with that proposal, my atheist opponent looked at me, smiled, and said, “Punt.” Larry King responded by going to a commercial.

December 20, 2022December 20, 2022

Slime in the Natural World

If you are around kids, you may be familiar with a toy called slime. The slime toy is a messy, oozy material that is sticky but doesn’t leave residue on your fingers. It’s slippery but has a texture that allows kids to mold it into various shapes. However, slime is more than a toy. We see different forms of slime in the natural world.

The slugs in your garden and most mollusks use slime, and the nasal mucus of a variety of animals is slime. The idea for the toy that kids love to play with originated from observing slime in the natural world. Slugs use mucus slime to lubricate their path and to stick to walls. Mollusks use slime in several ways, including making pearls. Natural slime is a highly designed material that allows animals and humans to function.

The saliva that keeps your mouth wet is one form of slime, but other forms of slime or mucus produced by your body are essential for survival. Slime in the form of mucus lubricates your esophagus so that food can go down your throat. The slime that lines your stomach protects it from acids. Slime in the natural world contains proteins called mucins. Chemists have found that animals produce mucins by adding a designed chain of amino acids to an existing protein, making it much longer.

A study into the chemistry of slime in the natural world has found some potential new uses for this material. For example, Omer Gokcumen, director of the study at the University of Buffalo, says that it may lead to new ways to treat cancer and other illnesses in the mouth and throat.

God is an incredible chemist. We see unique forms of chemistry in our bodies and the biological world around us. Gokcumen’s work focused on saliva, our first defense against pathogens, allowing us to eat various foods. Food chemistry is highly complex, and understanding how the body can handle new forms of food is becoming increasingly important. Around the world, people eat very different things than what we find in the typical American diet. Thanks to God’s design, the chemistry of slime makes it possible to feed every human on the planet.

Reference: National Science Foundation Research Reports for December 2022.