Animals Archives

February 8, 2024February 5, 2024

Alligator Brumation in Cold Weather

One of the amazing examples of design in the animal world is how alligators survive weather cold enough to cover their ponds with ice. Warm-blooded animals (endotherms), such as bears and groundhogs, hibernate in cold weather. Cold-blooded animals (ectotherms), such as alligators, become dormant using different metabolic processes. It is called alligator brumation.

The Swamp Park in Ocean Isle Beach, North Carolina, has made videos of alligator brumation. The alligators put their snouts out of the water, and their metabolic rate slows as they become lethargic. One park employee said, “We literally have gatercicles.” In Beaumont, Texas, there are some 550 alligators, including one 92-year-old that is 13 feet long and weighs over 1000 pounds. When his pond begins to freeze, he lets the ice freeze around his nose.

The design of the alligators’ body and metabolic structure allows them to survive in a temperate climate. It may not be obvious to most of us that alligators have an essential role in swamp environments. In the swamps in the southeastern part of the United States, they maintain a balance that benefits many other forms of life. As scientists try to understand that balance and how human encroachment affects it, the brumation system is essential.

Every form of life and ecosystem has a design that allows wise engineering. Cases like alligator brumation are amazing and speak of having been created with a particular need in mind. The more we know of the creation, the better we understand the mind and wisdom of God.

Reference: “Social media videos of ‘gatorcicles’ draw big numbers as experts say the reptiles are alive and well” on NBC News Now for January 24, 2024, by Antonio Planas

February 5, 2024February 4, 2024

Basal Cognition in Living Cells

Flatworms called planaria live in the muck of lakes and ponds worldwide. Scientists are intrigued by the fact that if you tear the worm in half, its head will grow a new tail, and its tail will grow a new head, giving you two worms. A new field of science involves the study of basal cognition in living cells outside of the brain.

Many years ago, I was involved with a project that attempted to fight the presence of invasive lampreys in the Great Lakes. Lampreys are eel-like fish that swim up tributary rivers to spawn. We placed barriers on streams to catch and kill the lampreys. The problem was that those who worked the lamprey traps were told to cut the eels in half and throw them back in the river to avoid the stink and mess of dead eels on land. They didn’t understand that returning the eels to water doubled their population because both halves survived.

In the case of the planarian, researchers at Tuft University found that the worm not only survived, but the tail contained previous memory. Both the head and tail of the worm remembered the location of a food source learned before the worm was cut in half. Michael Levin at Tufts has shown that cells can use subtle changes in electric fields as a kind of memory. This basal cognition in living cells works using electrical signals in animals and plants.

Scientists have found basal cognition in the Venus flytrap and the touch-me-not plant. The touch-me-not leaves will fold and wilt if touched to prevent being eaten. Scientists found that if the plant is jostled throughout the day without being hurt, it will learn to ignore jostling. The Venus flytrap can count, snapping shut only if two of the sensory hairs on its trap are tripped in rapid succession. It pours digestive juices into the closed trap only if sensory hairs are tripped three more times.

RNA seems to be a medium of memory storage for cells. Taking RNA from a slug that had experienced an electric shock and injecting it into a new slug causes the new slug to recoil from the touch that preceded the shock in the old slug.

This research shows that intelligence does not always require a brain but is wired into all living things and is vital to all life. The practical use of these discoveries of bioelectricity may help treat cancer where cells are not cooperating with the rest of the body. God’s design of life is far more highly engineered than anyone suspected. We have a lot to learn about basal cognition in living cells.

Reference: “Minds Everywhere” in Scientific American for February 2024, pages 44-51.

January 29, 2024January 28, 2024

Elephantnose Fish Designed for Survival

We can see evidence of a creator in the design features of living things that allow life to flourish in hostile environments. One of those environments is the very muddy rivers in Western and Central Africa. They are so muddy that underwater visibility is less than an inch. How do fish find food and avoid obstacles in muddy rivers like that? Peters’s elephantnose fish have the answer.

Peters’s elephantnose fish (Gnathonemus petersii) have an electrolocation system. An organ on their tails sends out weak electric field pulses. Receptors on the fish’s skin detect distortions to the field caused by any object or creature nearby. The fish also has a trunklike nose, which is full of electroreceptors. Peters’s elephantnose fish can make unusual movements to catch prey or avoid objects. It can even paddle backward in what researchers call a “moonwalk.”

Researchers have found that by swiveling the trunklike nose (called a schnauzenorgan) and shaking the electrically-charged tail, a Peters’s elephantnose fish can create a mental 3-D map of its environment without seeing it. Experiments have shown that this system is very accurate and efficient. In one test, the fish could identify a shape and correctly respond to that shape 94% of the time.

We suggest that such a unique design seen in Peters’s elephantnose fish gives strong evidence that life is not an accident. The evidence indicates it was designed by an intelligent Creator to allow every part of our planet to be inhabited by unique forms of life, even places that would be lethal to most life forms. This doesn’t happen by accident but rather by the God who created life. We can study and learn about the Creator because He created us in His image and shows Himself to us in the things He has made (Romans 1:20).

References: “Weakly electric fish use self-generated motion to discriminate object shape” in the journal Animal Behaviour, Volume 205, November 2023, pages 47-63, reported in Science Direct and in Scientific American, February 2024, page 18.

January 18, 2024March 29, 2024

Extinction of Plant and Animal Species

Near the end of 2023, the U.S. Fish and Wildlife Service removed 21 species from the Endangered Species Act because they have become extinct. What causes the extinction of plant and animal species?

Many factors lead to extinctions. Dr. Hugh Ross says the fossil record indicates that half of the mammal species that existed at the time of Adam and Eve are now extinct. Human activities that can endanger species include habitat destruction, introduction of invasive species, and introduction of diseases. Of course, animals can endanger people in various ways, including introducing diseases.

Humans have endangered plant species by introducing invasive plants. Plants used for decorative purposes can become invasive. Examples are English holly and the tree of heaven. Some plants that have become invasive were introduced to serve a purpose, such as controlling erosion. An example is the kudzu plant.

At other times, humans have caused extinction by killing large numbers of a species such as the passenger pigeon. Because of hunting and habitat destruction, the dodo bird became extinct within less than a century of its discovery. Humans caused the extinction of the great auk by foolish vandalism. Today, poachers are endangering the rhinoceros by killing them for no good reason. By contrast, human efforts rescued the California condor after it became extinct in the wild.

Woolly mammoths existed alongside early humans, and some scientists say they were essential for the survival of humans in some areas. People used them for food and their skins for protection from the elements. Their bones became tools, building materials, and even musical instruments. These large animals also kept plant vegetation under control while spreading their seeds. We can not always determine the cause of the extinction of plant and animal species, and that is the case with woolly mammoths.

The extinction of the dinosaurs occurred before humans were on the scene. That is good because humans and dinosaurs could not coexist on the land or at the same atmospheric oxygen level. God used them to prepare Earth for humans, and He orchestrated their extinction before He placed Adam and Eve in the garden.

As we look at the extinction of plant and animal species, we learn some essential facts. From the beginning, God had a plan for life as He prepared this planet for us to be here. He gave the first humans the responsibility to take care of the Earth, but we have not done a very good job. Finally, God is still giving us a chance to do better, and we have had some successes. Serving God involves serving others and caring for what God has given us for human flourishing. We can only do that when we submit to His plan for our lives.

References: U.S. Fish and Wildlife Service and A Matter of Days by Hugh Ross, page 74.

January 16, 2024January 15, 2024

Survival in the Cold by Design

As I sit in my warm office in Michigan today, I look out at snow and ice. My outdoor thermometer registers -8 degrees, and I wonder how the ducks on the river, the squirrels on the ground, and the birds in the air handle these frigid temperatures. I enjoy watching the birds on my bird feeders and the squirrels chasing each other in the oak trees, but I wonder how they survive. Then I apply my knowledge of physics, and I understand animal survival in the cold.

I always enjoyed teaching the heat and thermodynamics section of my high school physics class. One of my lines that always got a laugh was, “Why do we need to wear clothes to survive, outside of the obvious one.” The point is that our skin is not very good insulation against the cold. In winter, we pick clothes with air spaces within the fabric because air is a very poor conductor of heat, so it insulates us from the cold. We use coats stuffed with goosedown or some facsimile to be well protected from the cold. Goosedown also insulates sleeping bags and quilts.

Chickadees visit my bird feeders regularly. They usually are relatively sleek birds that fly smoothly and efficiently. As I look at my chickadees on this day of -8 degrees, they are almost round. Their feathers are fluffed up to trap air, so the birds are well insulated for survival in the cold. They don’t fly as smoothly as they do in summer. They crowd my feeders and would sit there without moving if they could.

Squirrels have a different problem. Their coats give them some protection, but getting food is an issue when heavy snow covers everything. They need to keep warm but avoid activities that would sap their reserve of nutrition. My gaze goes to the top of the oak trees, and I see a large round ball of leaves and twigs. Many years ago, to expand our church parking lot, we had to take down a tree with a large round ball of leaves and twigs near the top. As the tree came down, a squirrel ran out of the ball. I put my hand into the nest to see what was inside. Even though the air temperature was 20 degrees, it was very warm inside the ball of leaves and squirrel hair.

God has equipped His creatures for survival in the cold, and His design enables our Michigan winter to throb with animal activity. Trial and error explanations are weak because survival errors are lethal. We can see design in the natural world that speaks of God’s wisdom and planning. The evidence allows us to “know there is a God through the things He has made” (Romans 1:20). Watching animals thrive in very cold conditions is an excellent example of that evidence.

January 10, 2024January 9, 2024

Bristol Bay and God’s Design

There are many fascinating facts about Alaska. One of them is how landlocked species of fish, animals, and plants receive the required nutrients. With the weather extremes, short growing season, and lack of soil, making the area biologically rich requires an extraordinary life form. Fishing lodges thrive throughout the Bristol Bay area because sport fishers consider it one of the most desirable places to catch wild salmon and trout. In addition to the sport fishing, native people and commercial fishing operations make a living in the Bristol Bay area. Both humans and wildlife in the area depend on one fish species, the red salmon, or as it is also known, the sockeye.

More than 60 million wild salmon pour into Bristol Bay every year, sustaining the wildlife and human economy. Sockeye eggs provide food for all five species of Pacific salmon, but they also allow the land-locked species Arctic char, Dolly Varden trout, and rainbow trout to exist. The fry, smolts, and adults support commercial and subsistence harvesting.

The total mass of sockeyes each year is in the millions of tons. After the sockeyes have spawned, they die, and their carcasses provide nutrients that allow plants to thrive in an area with very little soil. Without the sockeye, the entire Bristol Bay area would be a biological desert unable to support any fish or animals that eat fish.

Mining operations are trying hard to get permission to establish several kinds of mines in the Bristol Bay region. Undoubtedly, such operations would create roads capable of hauling metals, mining equipment, chemical leaching, and waste materials. Supplying food and managing waste from hundreds of miners and support personnel living in the Bristol Bay area for years at a time could destroy the fragile ecosystem, harming those who depend on it. The more scientists study the ecology of Alaska, the more they become aware of its fragility.

Bristol Bay speaks of our need to care for the creation that God has placed in our hands. It is hard to experience this area and believe its formation and natural balance happened because of blind, accidental chance. We must not allow it to become a showcase for selfish human greed and mismanagement.

Reference: Alaska Magazine for February 2024, page 48.

January 9, 2024January 8, 2024

Why Women Have to Experience Menopause

We get some interesting questions in this age of skepticism and rejection of God. One that came up recently is why women have to experience menopause. Like many questions raised by those who wish to deny God’s existence, this question is rooted in ignorance and a failure to think carefully.

Most members of the animal kingdom die when they can no longer reproduce. Mammals such as elephants and orangutans remain fertile throughout their lives. The number of animals that live beyond their reproductive years is very small. It has only been documented in a few species, including humans, orcas, and short-finned pilot whales.

There is no scientific explanation for the uniqueness of the human reproductive cycle. Dr. Shankar Singh of McMaster University in Canada maintains that this is because men favor younger mates, but this evolutionary explanation ignores the genetic implications that come with it. The more logical explanation of this fact is the different roles women have at various stages of life. In Titus 2:1-5, Paul talks about older women teaching younger women.

As we get older, our roles change. There is a reason for humans to live beyond the time when they can produce offspring. Teaching, leading, and serving can be more effective when done by older humans. That is not true of fish, birds, rodents, insects, or most mammals.

It is a good design that older women can no longer reproduce. My 70+-year-old wife says the thought of having a baby at her age is appalling. For orangutans and elephants, a female having offspring late in life helps maintain the species, and the whole group raises offspring, not just the mother.

Instead of asking why women have to experience menopause, we should note that God’s remarkable design of reproduction uniquely shows His handiwork.

Reference: National Wildlife, winter 2024, page 17.

January 4, 2024January 2, 2024

God Gave Predators the Tools They Need

The balance we see in the natural world is strong evidence for design rather than chance. God gave predators the tools they need to control the population of animals that reproduce in large numbers. Owls are a great example of skillful predators. Rodents can cause significant harm to humans if their populations get out of control. However, in some cases, humans have interfered with the natural function of the predators of mice and rats, allowing the population of those rodents to grow to the point of threatening human populations.

In places where humans have not interfered with the natural balance, the design features of predators allow them to control rodent populations. Winter snow cover benefits rodents because they can move under snow. This security would let rodent numbers explode were it not for predators designed to catch them under the snow. One of those predators is owls.

An owl can capture a rodent under two feet of snow by detecting infrasonic low-frequency sounds. Dr. Cristopher Clark at the University of California, Riverside, has been studying how the design of owls allows them to have this skill. Using modern equipment, Dr. Clark has found that only low-frequency sounds can penetrate deep snow. The owl’s facial disk is especially sensitive to these low-frequency waves, and the infrasonic detectors are located right behind each eye. The owl will hover in midair over a spot where it senses prey. When the owl receives the low-frequency sounds, it plunges into the snow to grab the prey with its talons.

Between owls, foxes, and some subsurface animals, God gave predators the tools they need to control the rodent population, protecting humans. The predators’ special equipment is required to remove the rodents, and the design of that equipment indicates it was not a mere accident.

Reference: “Snow Hunting Owls” on nwf.org and in National Wildlife magazine Winter 2024, page 8.

December 27, 2023December 26, 2023

Birds that Swim in Cold Water

Scientists have only recently come to understand many designs in nature. An interesting example is how birds that swim in cold water survive without hypothermia. The feet of ducks, gulls, loons, and geese show an example of incredible hidden design.

In these birds, arterial blood enters the leg and cools down. On its way to the heart, ventral blood picks up the heat released by the arterial blood in a process called “countercurrent heat exchange.” A mesh of arteries and veins called the “rete mirabile” (Latin for “wonderful net”) surrounds the blood vessels and amplifies the heat exchange. This arrangement limits the amount of heat the bird loses, saving it from having to use energy to reheat the blood. When you combine this discovery with the design that allows them to stand on one leg, you see how they are ideally suited to live in cold climates.

It is truly remarkable that virtually all climate zones have life forms perfectly designed to live in them. God created life to fill the whole earth regardless of climate conditions. Romans 1:20 says, “We can know there is a God through the things He had made.” Birds show the design of living things that radiates the wisdom and knowledge of the Creator. The foot design of birds that swim in cold water is just one great example of that.

Reference: Audubon magazine winter 2023, page 52

December 12, 2023December 11, 2023

You Can’t Sneak Up on a Sleeping Bird

Have you ever tried quietly approaching a bird that appeared to be sleeping? If you have, you were probably unsuccessful, especially if the bird was nesting. Researchers have discovered a design feature called “microsleeps” that may help explain why you can’t sneak up on a sleeping bird.

Researchers discovered this feature in chinstrap penguins in Antarctica. The Max Planck Institute in Germany, the Korean Polar Research Institute, and the Neuroscience Research Center in France conducted this research. They found that the chinstrap penguins nod off thousands of times daily but sleep for only four seconds each time.

The researchers attached brain wave sensors, so there is no question that the birds were sleeping. The short microsleep naps add up to roughly eleven hours a day. The birds are essentially awake all the time, protecting their eggs, their young, and their nests. To get accurate data, researchers chose Antarctica, where the Sun does not set during the breeding season. You can’t sneak up on a sleeping bird, but researchers haven’t determined if all birds practice microsleep or whether they do it when they are not nesting.

The more we learn about the creation, the more we appreciate the Creator who made all living things, giving them the necessary equipment to survive. Human technology is opening more and more doors of understanding to “the things God has made” (Romans 1:20). The complexity of systems that allow survival and safety for various animal species is another argument for rejecting the notion that life is the product of blind chance.

References: Smithsonian Magazine and National Geographic