tardigrade Archives - DOES GOD EXIST? TODAY

November 26, 2024November 19, 2024

Macro-World Micro-World

We live in a macro-world in which we see and touch large things. Most of us don’t recognize there is a micro-world made up of very small things. Without the small things, the large things could not exist. The most obvious example of the need for small things is the food that animals need to survive.

Food chains start with the very small. Carnivorous insects that don’t eat plants provide the starting point for food chains. As technological tools become available, scientists discover more and more small animals, even some that are vertebrates. One example is the discovery of tiny Brachycephalus pulex frogs, also known as Brazilian flea toads, because they can jump 30 times their body length. They are only 7 millimeters (.3 inches) long, and unlike other frogs, they don’t go through a tadpole stage. Their eggs hatch directly into tiny frogs.

Scientists have found tiny animals in desert environments providing a basis for life in what would appear to be a sterile environment. Tardigrades, known colloquially as water bears or moss piglets, are another example of very small creatures that are important agents for life in the macro-world.

Many plants and animals that allow life to exist are not perceived through our senses. Everywhere we examine the macro- or micro-world, we find a design created by God. Romans 1:20 tells us, “..the things of God which the eye is unable to see ever since the world was made are clearly perceived through the things that are made.” The things we can’t see include the spiritual things of God and the small things in the material world as well.

— John N. Clayton © 2024
Reference: Wikipedia

May 28, 2024June 20, 2024

Free Radicals are Chemically Reactive

One of the least understood design features of living things is the role of free radicals. The design of atoms and molecules calls for electrons to be paired for stability, but a free radical has unpaired electrons. With their unpaired valence electrons, free radicals are chemically reactive. Although some free radicals are essential to life, the accumulation of free radicals can cause cell damage.

Stress conditions such as radiation can cause harmful free radicals. Researchers have found that tiny animals called tardigrades (or water bears) exposed to stressful conditions curl up into a state of dormancy called a tun. That can explain their ability to survive in the vacuum of space, frigid temperatures, or radiation bombardment. The metabolism of the tardigrades shuts down in the tun state, but why is unclear. This intriguing discovery could potentially lead to practical applications such as medical treatments that slow the aging process, offering a glimmer of hope in the face of free radical damage.

Evolution cannot explain why free radicals are not chemically reactive. Scientists are studying the design of atoms and molecules with magnetic properties related to electron spin. This phenomenon goes back to creation itself. When God produced matter/energy in the beginning, electron spin, magnetic pairing, and free radical production were built into the very design of atoms and molecules. This design structure allows life to exist.

The future is bright as scientists learn more about the effect of free radicals on human health. Learning about the complexity of matter and life reminds us of “Wisdom’s” comment in Proverbs 8:22-23: “The Lord possessed me at the beginning of His work, before His deeds of old. I was appointed from eternity, from the beginning before the world began.”

Reference: Scientific American for May 2024, pages 10-11.

June 7, 2023June 1, 2023

Tardigrades Have Incredible Resilience

NASA’s “Astronomy Picture of the Day” for May 21, 2023, shows a small creature called a tardigrade crawling on some moss. The picture is an electron micrograph of the tardigrade, which is a millimeter long (0.0393701 inches). Most tardigrades range between 0.3 and 0.5 mm. They eat plants and bacteria and help convert them to other forms essential to molding and shaping the environment. In addition, tardigrades have incredible resilience to adverse conditions.

Tardigrades can go for decades without food or water. They can withstand temperatures near absolute zero but can also survive in boiling water. They can survive in pressures well above what has been measured on the ocean floor or even in a near-perfect vacuum. Tardigrades have incredible resilience, allowing them to survive direct exposure to high radiation levels. They can repair their own DNA or reduce their body water content to a few percent.

They were first described in 1773 by a German zoologist who called them “little water bears.” Then, in 1777, an Italian biologist gave them the “tardigrade” name, which means “slow walker.” These creatures remind us that living things too small to see with normal human vision are major movers and shapers of higher life forms.
The formation of unseen life systems that allow us to exist demonstrates life’s complexity. It demands an acceptance of the fact that we are not just a chance collision of atoms. The more we see of life and design in the creation, the more we comprehend the magnitude of the Creator’s power and wisdom.

Reference: NASA’s Astronomy Picture of the Day

April 11, 2019April 9, 2019

Tardigrades – Water Bears – Indestructible Life

Imagine an animal that can survive without water, can withstand 300-degree temperatures, can live without oxygen, can survive the vacuum of space, can survive almost any amount and kind of radiation, and can hibernate for decades. This is not science fiction; it is an animal phylum known as tardigrades, often called “water bears.” There are as many as 1,200 species of tardigrades, and they live all over the Earth.

In 2007 scientists put two species of tardigrades in containers and launched them into orbit and opened them up to cold, airless space with no protection from the punishing radiation of the Sun and stars. When they returned the tardigrades to Earth, they were alive, and they are still producing offspring that are also alive and reproducing.

These animals are microscopic, about half a millimeter long when fully grown. Under a microscope, they look like a combination of a chubby bear and a single-eyed alien. They have legs but no circulatory system or skeleton. In extreme environmental conditions, they curl up and enter a survival mode called cryptobiosis. When conditions improve, they revive and resume their normal life processes. They eat algae and aquatic plants.

Scientists have studied the tardigrade genome and found ways to improve crop survival in bad weather. The United States government has allotted five million dollars to scientists attempting to find ways to protect vaccines and human blood using what they learn from the genome of tardigrades. Other uses include preserving organs for transplant and producing a sunscreen that protects against ultraviolet rays as well as reducing radiation damage in cancer treatment methods.

The development of life on Earth has not been a hit-or-miss process. As science looks at smaller and smaller things that our technology allows us to see, we realize that there is a whole world of carefully designed microscopic plants and animals that form the base of the animals we CAN see. Every time we look into the world around us, we see that a wonder-working hand guided by an intelligence far beyond our own has gone before and provided for our well-being. Thanks to technology, we realize that now more than ever before.

Data from an Associated Press article titled Ultimate Survivors by Beth Borenstein, April 2, 2019. For more on tardigrades click HERE.