Animals Archives

June 11, 2020June 8, 2020

We Could Not Survive Without Bacteria

We usually think of bacteria as agents of infectious disease–“germs.” However, many types of bacteria are helpful to us. The truth is, we could not survive without bacteria.

More bacterial cells are living on and in your body than there are human cells in your body. Your body has more bacterial cells than there are people in the whole world! Even more amazing, the total biomass of all bacteria in the world is greater than that of all plants and animals in the world!

Bacteria in our digestive system allow us to digest the food we eat. Good bacteria even help us fight off their less-friendly cousins. Researchers recently discovered that a human skin bacteria (Staphylococcus epidermidis) protects against skin cancer. Those bacteria produce a compound nicknamed 6-HAP, which stops DNA formation in cancer cells, but not in healthy cells. The researchers hope to use this information to develop new treatments for skin cancer.

Bacteria live everywhere in soil, water, hot springs, the deepest part of the oceans, deep in the Earth’s crust, and even in radioactive waste. Bacteria break down waste materials, including sewage and oil spills, to help keep our world clean. Industry uses bacteria to produce cheese, yogurt, ethanol, vitamins, antibiotics, and prescription drugs.

Before humans or any form of animal life could live on the Earth, there had to be a full complement of the right kinds of bacteria. An intricate system of checks and balances had to exist for things to stay in a favorable condition. We have often paid the price for upsetting the balance of the microscopic world.

Don’t forget that we could not survive without bacteria. They feed us, clean up after us, and even fight the diseases some of their cousins cause. They also show us the wisdom and intelligence of the Creator who made us, and those microbes we can’t see.

June 10, 2020June 8, 2020

Stink Bugs and Human Mistakes

Brown marmorated stink bugs (Halyomorpha halys) have become a significant pest in areas of the United States. They are native to Asia, but humans accidentally introduced them into the USA in 1998. Since they have no natural predators in North America, their numbers have grown dramatically. We can learn a lesson from stink bugs and human mistakes.

Brown marmorated stink bugs are commonly known to Americans simply as “stink bugs.” The “stink” is because they give off a foul smell when disturbed. “Marmorated” refers to their marbled coloration. You can distinguish brown marmorated stink bugs from similar-looking beetles by the alternating light and dark colors on their antennae and the edges of their abdomen.

When the weather turns cold, these pests find ways to get into homes through small openings, and there they hibernate. Sometimes the heat in the house causes them to become active and annoy the residents during the cold months. The real problem arises when warm weather arrives. That’s when they come out in force.

Halyomorpha halys is a major agricultural problem in some areas because they feed on a wide variety of fruit and vegetable crops. They pierce the plants or the fruits with their needle-like beaks and suck out the fluids. At the same time, they inject saliva, which causes shriveling and rotting.

In their native countries, there is a wasp that feeds on these stink bugs. The US Department of Agriculture has looked into importing those wasps into the United States to bring the bugs under control. The problem with that idea is the wasps might become new pests because they don’t have native predators. Traps remove only some of the bugs, and pesticides can have harmful side-effects. Pesticides are also not very effective because they stay on plant surfaces. The stink bugs don’t eat the surface of the plants. They pierce through the surface and drink the juices from inside. Perhaps the best hope, for now, is that some of our native birds and insects start to develop a taste for stink bugs as their population increases.

The Creator has given us an excellent and well-balanced system, but we humans have a knack for ruining God’s gifts. That has been true from the Garden of Eden until today. We see a connection between stink bugs and human mistakes.

June 7, 2020June 2, 2020

Fire Chaser Beetles

It seems that God has created creatures to fill every possible need that can occur in nature. One of the most interesting of these is a beetle that is actually attracted to fires. According to the American Museum of Natural History, the beetle is of the genus Melanophila. People who live in areas where wildfires are frequent refer to them as “fire chaser beetles.”

When a fire occurs, the beetles sense its presence and fly toward it. They will lay their eggs in forest material that is still smoldering, or in material that has been recently burned. The biological explanation is that their eggs are safer from predators than they would be in an area that has not been burned, but how would they know that.

If you think about it, this beetle is a significant factor in the recovery of a burned area. One problem after wildfires is that much of the food for birds and mammals has been destroyed. The whole ecosystem has to be reset, and the eggs and baby beetles of Melanophila are at the bottom of the food chain. The fire chaser beetles’ ability to locate the fires involves an infrared detection system. Instead of flying away from the fire, as you would expect, they fly toward it.

How such a system could develop by natural selection is an interesting question. It seems that fire chaser beetles are part of God’s design to assist the recovery of burned-over areas.

Reference: Reader’s Digest, June 2020, page 36.

June 6, 2020June 2, 2020

Pollination of an African Lily

Various types of plants are pollinated by bees, butterflies, hummingbirds, or bats. Non-flying mammals pollinate some plants. Rodents accomplish pollination of an African lily (Massonia depressa) that grows in a desert region of South Africa and Namibia.

Massonia depressa forms two huge leaves lying flat on the ground. Its flower in the center is at ground level within reach of the gerbils which pollinate it. Each evening the plant secretes globs of nectar as thick as jelly. The strong yeast-like scent attracts hairy-footed and short-eared gerbils that come at night to eat the nectar. The gerbils get covered with pollen as they spread the flowers open with their front legs and push their faces into the nectar.

Although the nectar is sugar (sucrose) jelly, it is 400 times as thick or viscous as an equivalent sugar solution. Rodents are the pollinators because the nectar is too thick for insects to drink. The gerbils lap it with their tongues. To accommodate the mammal pollinators, the flowers must be more sturdy and produce more pollen than plants pollinated by insects. Unlike the brightly colored flowers that attract flying pollinators in the daytime, these flowers are dull. The Massonia depressa produces seeds that are light enough that the wind scatters them.

We see evidence of design in the pollination of an African lily. This plant depends on a gerbil for reproduction, and the rodent depends on the plant for food. They need each other to survive. The plant is on the ground where the animal can easily reach it. It produces a fragrance and jelly to attract and feed the animal. Insects can’t eat the food or pollinate the plant. The lily and the rodent seem to be made for each other. Some suggest they evolved together by coincidence. We suggest this is another project by the Master Designer.

May 28, 2020May 26, 2020

What Makes Us Human?

One of the significant points of contention between those who believe in God and those who don’t is the concept of what makes us human. The biblical position is that humans are that form of life created in the image of God. Our spiritual makeup allows us to create art and music, worship a supreme being, feel guilt, be sympathetic, and have a form of love that is self-sacrificing and has nothing to do with survival. The atheist response to this is that our intelligence and brain structure accounts for these characteristics. The atheist insists that they are totally a product of our evolution.

What does the evidence show? That is a complicated question, and one we frequently address as science makes new discoveries. National Wildlife magazine (June/July 2020) published an interesting article about crows and research by John Marzluff at the University of Washington. For the past ten years, researchers at the university have been putting on caveman masks and catching and tagging crows. The crows have learned that the caveman face means trouble, and they mob and dive-bomb the researchers. When baby crows learn to fly, they immediately do the same, even though they do not have personal experience with being caught and tagged.

Crows are incredible creatures. Crows will fashion twigs into hooks to reach food in a hollow tree or limb. Other crows will drop nuts on a hard pavement to crack them open. Crows have learned to pay attention to what a farmer has in his hands. They will fly away from a farmer with a gun, but not when the same farmer holds a rake. Crows will help raise younger siblings, and that cooperation causes them to flock together and seemingly communicate with each other.

The point is that intelligence is not a measure of human-ness. The things that make humans different than crows is not our brain. Mentally challenged humans do the things that make us human. Many animals with high intelligence do not engage in those things. What makes us human is being created in the image of God. Having that image makes humans unique and special, and gives us value and purpose in our existence. Human life is sacred, and that hasn’t changed despite our abuse of one another.

May 26, 2020June 1, 2020

Why Do We Need Insects?

Many years ago, while working in a teen camp in Alaska, I heard a skeptical teenager disparage God’s existence by saying that if God existed, He certainly wouldn’t have made mosquitoes. I have heard similar comments about ticks, hornets, lice, locusts, spiders, and stink bugs. I suspect we have all had times when we were unhappy with annoying bugs, yet when you examine the role of insects, you realize they are critical to our own existence. The well-known entomologist E. O. Wilson said, “If human beings disappeared tomorrow, the world would go on with little change, but if invertebrates were to disappear, I doubt the human species could last more than a few months.” Why do we need insects?

Insects pollinate plants, aerate and fertilize the soil, decompose dung, and the bodies of things that have died. They control pests contributing 70 billion dollars every year to our national economy. Ninety-six percent of land-dwelling birds feed their young on insects, consuming approximately 400 to 500 million tons of insects. Most creatures in and around lakes and streams feed on insects, including fish and bears.

Why do we need insects? Humans are already seeing the cost of eradicating them. There are 68 species of bumblebees and roughly a fourth of those are in danger of becoming extinct. In Europe, the data shows a 76% drop in insects, including bees, beetles, lacewings, and katydids. The loss of pollinating insects has sharply affected the growing of many cash crops, and scientists are studying the effects of insecticide use.

Before we castigate God for what He has created, we need to be sure we have all the facts. We should learn what each creature does and how it contributes to our own well being. I dislike mosquitoes as much as the next person, but a majority of mosquitoes are pollinating insects. I am reactive to a bee sting, but bees contribute to much of what I eat. From our earliest existence, God has challenged us to take care of what He created. (See Genesis 2:15.) That includes caring for and protecting the agents that allow Earth to be hospitable to our existence.

Data and quote from National Wildlife magazine, June-July 2020, pages 26-31.

May 23, 2020May 22, 2020

Bird Droppings and Waste Disposal

If you ever found your car looking like the one in the picture, you know how frustrating it can be. Maybe you should have parked in a different spot. Seriously, bird droppings and waste disposal by all animals present many design challenges.

One of the major issues for all living things is how to dispose of waste. Left inside the body, waste products can be toxic. Surviving the toxic effect can be a significant challenge for a hibernating bear. For birds, it becomes complicated because they must remain lightweight to fly. They cannot have a waste removal system that is heavy or dense. That means there is no bladder and no elaborate intestinal tract in birds.

God has designed a system of waste removal in birds that we are all aware of, but may have never considered carefully. The next time you see bird droppings on your car or the sidewalk, take a close look. You will see that there is a dark spot surrounded by white material. The dark spot is fecal matter, and the white stuff is urine. The urine washes away quickly in the first rain, and the fecal matter remains. Waste removal systems frequently benefit other forms of life, and that dark spot may contain seeds that contribute to the spreading of plant life.

Some birds have unique disposal systems such as owls, which make pellets out of solid material they eat, including bones. The birds that decorate your car are specially adapted to flight. The design of their disposal system allows them to be rulers of the sky. Birders are probably familiar with a periodical put out by a humorous writer who called himself Dick E. Bird. Years ago, he wrote this poem to explain how birds defecate:

“Birds, ya know, don’t got no bladder,
So wherever they is, it just don’t matter.
On the deck or on the sills,
The spirit moves, you hear a trill.
Then they fly, just like a thief,
That is how they spell relief.”

God intelligently designs every living system, and waste disposal systems are no exception. Bird droppings and waste disposal from animals also require clean-up after the fact, and God has that covered too, as we have discussed before.

May 21, 2020May 20, 2020

Sunlight Affects Life Cycles

One of the wonders of life on planet Earth is the influence of sunlight. As winter fades away and summer approaches, we see all kinds of changes in life. As scientific research continues into the wonders of the animal and plant kingdoms, we see more carefully designed biological systems. Here are some examples of how sunlight affects life cycles:

COCCOLITHOPHORES: These are tiny phytoplankton plants that live in the ocean. As the season changes and the Sun warms the waters, those organisms increase their rate of reproduction. They would smother themselves with overcrowding except for the fact that they give off dimethyl sulfide. That chemical rises into the atmosphere and oxidizes into solid sulfate particles. For raindrops to form, there must be moisture, cool temperatures, and condensation nuclei. The solid sulfate particles provide the condensation nuclei, and the rising air cools the moisture from the sea resulting in clouds. The clouds block the sunlight, thus cooling the sea and slowing down the reproduction rate of the coccolithophores and avoiding a massive die-off. This phytoplankton literally manipulates the weather to ensure its own survival.

SALMON. These fish know when to return to the waters of their birth to spawn. Built into their bodies is a pineal gland that stimulates the pituitary gland, triggering an urge to spawn. Navigation tools designed into the salmon allow them to find the place of their origin where they spawn and die.

BEAN APHIDS AND OTHER ANIMALS. Bean aphids give birth when the length of the day reaches 14 hours and 55 minutes, assuring that the offspring will have warmth. Similar triggers by sunlight affects life cycles, allowing muskox to shed their insular undercoat, mallard ducks to shed their winter down, and snowshoe hares to change their color from white to brown before all the snow melts.

FROM FRUITFLIES TO HUMANS. Fruitflies shed their pupal husk an hour before dawn even when kept in the dark. Even when kept in total darkness, hummingbirds slip into torpor at dusk, allowing them to conserve energy. A poppy folds its petals at dusk, even in a dark box. Both the hummingbird and the poppy will resume operations at dawn, even in the darkness. Scientists are still researching what triggers these changes even without sunlight. Medical researchers are also studying how humans respond to a lack of sunlight, causing seasonal affective disorders (SAD).

Studying the incredible ways in which sunlight affects life cycles on Earth is a great way to grow in appreciation for the creation process. We marvel at the careful design built into all living things. David looked at himself and his world and remarked, “I will praise you, for I am fearfully and wonderfully made: marvelous are your works…” (Psalms 139:14).

These examples were found in National Wildlife magazine Volume 32 # 1.

May 20, 2020May 19, 2020

Evidence for Design in Symbiosis

The natural world is full of examples of two species living together in a way that each benefits the other. This mutualistic relationship is known as symbiosis. In some cases, the species are totally dependent on the relationship for their survival. In many plant/animal relationships, the animal depends on a plant for food, and the plant depends on the animal for pollination or the spreading of seeds. We see evidence for design in symbiosis.

One of the most interesting symbiotic relationships is between ants and butterflies. Scientists refer to the caterpillar in this relationship as being myrmecophilous, which means “ant-loving.” Dr. Philip Devries has written several articles in scientific journals about the caterpillars of certain butterfly species and their symbiosis with ants. The caterpillars feed on the nectar of croton trees, but they have a mortal enemy in the form of wasps. The wasp will find a caterpillar, kill it by stinging and then eat it. If ants are present, they will drive off the wasp and protect the caterpillar. Devries has covered some croton trees with ants, and they will have many caterpillars, but trees without ants will have very few caterpillars.

So the ants benefit the caterpillars, but what do the ants gain from this relationship? The caterpillars have organs on their posterior which extrude a clear liquid containing amino acids but virtually no sugar. The croton tree has a secretion that is 33% sugar but has very little nutritional value. The ants get vital nutrition from the caterpillar even though what they get is not sweet.

The caterpillar has other ways of attracting ants, including an organ on its back that secretes an ant pheromone that chemically attracts them. The caterpillar also has an organ that attracts ants by sending sound vibrations through the wood of the tree. Because of this feature, Dr. Devries coined the term “singing caterpillars.”

One of the great challenges to evolutionists is explaining how such a complex system of symbiosis happened by chance mutations. The more we study such relationships, the more different systems of design we see in the natural world. The more relationships we see, the more difficult it is not to recognize evidence for design in symbiosis. It speaks to us about God’s wisdom and design that allows the biological world to exist.

An article by Dr. Devries appeared in Scientific American, October 1992, pages 76-82.

May 19, 2020May 18, 2020

Nitrogen Fixation and Life

There are many chemical wonders in our world, but few are as important and complex as the chemistry of nitrogen. Nitrogen makes up 78% of our atmosphere. It combines with oxygen to form nitrates and with hydrogen to produce ammonia, both of which are essential for growing our food. Nitrogen fixation, which is how nitrogen gets from what we breathe to what we eat, is an amazing demonstration of design.

First, let us review a little high school chemistry. The atoms of all elements have electrons which give them their properties for forming compounds. The electrons are arranged in pairs with their magnetic poles designed so that in a stable arrangement, one electron’s north pole is matched with its neighboring electron’s south pole. The electrons have various orbitals with different energy levels. The atom is stable and chemically inert if an orbital is filled with all the paired electrons it can hold. For example, neon has 10 electrons. The first two orbitals each have two paired electrons, and the last orbital has six electrons in three pairs. This pairing of electrons makes neon an inert gas which does not combine chemically with other elements.

Nitrogen has an uneven number of seven electrons. So how does nitrogen become chemically stable? The answer is that two nitrogen atoms share three electrons, giving them stability. The two nitrogen atoms bond together to form a diatomic molecule that cannot be easily pulled apart to bond with other elements. How strong is the bonding? To break up a nitrogen molecule into two nitrogen atoms requires temperatures of 400 to 500 degrees Celsius and pressures of 200 atmospheres. So with nitrogen as the dominant element in our atmosphere, the atmospheric gases are stable and inert. Also, nitrogen is not a greenhouse gas that could threaten our temperatures on Earth. How then has God built a system that takes these stable nitrogen molecules and breaks their triple bonds to produce nitrates and ammonia?

If you think this isn’t an important subject, ask yourself where your food comes from? The answer is that 50% of the American diet is produced using artificial fertilizers containing nitrogen, which has been “fixed.” Nitrogen fixation combines that inert gas with oxygen and/or hydrogen to supply the soil with the chemical needed to grow the plants we eat, and which the livestock eat to provide us with meat.

Bacteria accomplish God’s method of nitrogen fixation. The bacteria turn nitrogen into ammonia, which is a nitrogen atom sharing electrons with three hydrogen atoms instead of with another nitrogen atom. Plants known as legumes such as soybeans and peas, as well as bayberry and alder trees, attract bacteria which concentrate in nodules on the plant’s roots. The bacteria turn nitrogen gas into ammonia and nitrates the plants can use. Cyanobacteria in the ocean and cycad plants on the land are also major nitrogen fixers. Scientists are also discovering tropical plants that contribute to the wealth of nitrogen compounds in the soil.

Most of our fertilizers have nitrogen fixed by a method called the Haber-Bosch process. It uses massive amounts of energy to break the triple bonds of nitrogen gas. Producing 500 degrees and 200 atmospheres is expensive, and that is why you pay so much for the fertilizer you use in your garden. God’s methods are free. Scientists are trying to figure out how to recreate God’s nitrogen fixation method to save energy and produce more food.

Many bacteria are beneficial in various ways, and nitrogen fixation is only one of them. This is a great apologetic for God’s wisdom and design in preparing the Earth to provide food for us to eat.

An excellent article on this topic titled “Out of Thin Air” was published in Science News, April 12, 2008. It is available online at THIS LINK, but a subscription is required to read it.