science Archives

April 20, 2026April 19, 2026

The Acoustic Reflex

Human ears are amazing. They can distinguish half a million tones and detect sound levels from 0 to 135 decibels. Zero dB is a very faint sound, and 135 dB is extremely painful and damaging to hearing. Decibels are measured on a logarithmic scale, so 135 dB is 10 trillion times as loud as 0 dB. Anything over 85 dB can damage hearing with long exposure, but God has given us an automatic protection system that activates between 70 and 100 dB. It is called the acoustic reflex.

Here is how the human acoustic reflex (also known as the stapedius reflex or auditory reflex) works. High-intensity sounds trigger an involuntary muscle contraction in the middle ear. Tiny muscles in the middle ear, primarily the stapedius and tensor tympani muscles, contract to dampen the movement of the ossicles or stapes (the small bones in the middle ear). Because of this reflex, chain saws, loud engines, or hair dryers can make it difficult to hear conversations, which are typically not more than 60 dB, but it helps protect the inner ear from damage caused by loud noises.

When the acoustic reflex activates, the stapedius muscle pulls the ossicles (stapes) of the middle ear away from the cochlear window, and the tensor tympani muscle stiffens the stapes by pulling on the eardrum and malleus (hammer bone). This is essential to protect hearing in everyday environments. However, the acoustic reflex is not fast enough to react to sudden loud noises, such as gunshots. Also, extremely loud noises or prolonged exposure to loud noises can still harm your hearing, and for that reason, wear ear protection when around loud noises. We should be thankful for God’s design of ears and for the automatic protection He provided as part of the amazing design of the human body.

April 10, 2026April 10, 2026

Return From the Moon

The astronauts of Artemis 2 have made their successful return from the Moon. I am sure that we will soon learn new things about the Moon and space flight. The plan is to land people on the Moon as early as two years from now.

This week, we have been looking back at information we have posted about the Moon over the last several years. Our Moon is more than 50 times more massive relative to our planet than the moons of any other planets in our solar system. Because of that, its gravitational pull affects life on Earth. Its braking power has slowed Earth’s rotation rate to give us 24-hour days. Longer days would cause day-to-night temperature extremes, and shorter days would produce extreme climate fluctuations. The Moon also stabilizes the tilt of Earth’s axis, which is essential for a stable climate.

The size and albedo (reflectivity) of the Moon provide the optimum nighttime illumination for nocturnal animals. Its size allows it to periodically eclipse the Sun, giving scientists much to learn about the Sun’s corona. The bottom line is that, according to astrophysicist Hugh Ross, for a planet to host advanced life requires a planet-moon system “with virtually identical” to ours, and it “must orbit a star virtually identical to the Sun.”

We can be thankful that God has given us the exact Moon that we have. I am sure that when astronauts return from the Moon, they will be glad that we live on planet Earth. Click HERE to learn a lesson in perspective from the Moon, written by John N. Clayton.

April 9, 2026April 9, 2026

A Solar Eclipse from Space

The Moon is just the right size and at the right distance from Earth to give us perfect solar eclipses. Tomorrow is the day when Artemis 2, with its crew of four, is scheduled to return to Earth. While on their journey around the Moon, they witnessed a solar eclipse from space. It was not the same as seeing a solar eclipse from Earth because the Moon was much closer to them than it is to us on Earth. Because of that, the Moon’s shadow was larger, but the astronauts could still see the Sun’s corona.

Earth comes between the Sun and the Moon two to four times per year, casting a shadow on the lunar surface. Total lunar eclipses are less common than partial or penumbral eclipses, but they are more interesting to watch. According to legend, CHRISTOPHER COLUMBUS USED A TOTAL LUNAR ECLIPSE to get the supplies he needed from the people of Jamaica. Whether full or partial, lunar eclipses can serve to remind us of HOW ESSENTIAL OUR MOON IS.

It was a rare and interesting experience for the astronauts to travel around the Moon and observe a solar eclipse from space, but I’m sure they will be excited to return home. They will be bringing back new information about our natural satellite, and the more we learn, the more we see evidence of God’s design.

April 8, 2026April 8, 2026

The Moon’s Gravity Affects Earth

As I write this, Earth’s gravity is pulling the Artemis 2 and its four astronauts back toward home after completing a trip around the Moon. Gravity is one of the precisely tuned forces that make life possible. It also explains why the Moon doesn’t fly off into space. Earth’s gravity influences the Moon, and the Moon’s gravity affects Earth in several ways.

One way our planet is affected by the Moon’s gravity is through the tidal lock that causes the same side of the Moon to always be visible from Earth. The Artemis 2 crew had the rare privilege of seeing the far side of the Moon as they passed around it. I’ve heard some newscasters call it the “dark side of the Moon,” but the Moon has no dark side. The Sun’s illumination reaches all sides of the Moon as it orbits our planet.

The Moon’s gravity influences Earth by CAUSING THE OCEAN TIDES. Once, it even HELPED OPEN THE SUEZ CANAL. God’s finely tuned design of the Earth-Moon system allows us to exist on this planet.

April 7, 2026April 7, 2026

How Many Moons in Our Solar System?

As I write this, four Artemis 2 astronauts are on their way back to Earth after making a trip around the Moon. Until they make their planned splashdown in the Pacific Ocean near San Diego, California, on Friday, April 10, 2026, I want to look back at what we’ve written about our amazing natural satellite. Our Moon is very unique—unlike any other moon—in both size and number. There are how many moons in our solar system? You can see from THIS ARTICLE that the number of confirmed moons keeps changing.

Will the number of confirmed moons change again in the future? Probably, but we know that Earth has only one Moon, and it is just the right SIZE and MASS.

So, there are how many moons in our solar system? If you count all the moons orbiting the planets, the total is approximately 430. That number is subject to change, but there is only one that is just right, and I am sure God designed it that way.

March 27, 2026March 27, 2026

The Night Sky Is in Danger

Five months ago, we reported that a California company called Reflect Orbital planned to place 4,000 solar mirrors in a sun-synchronous orbit to reflect sunlight into Earth’s twilight areas. They claimed it would extend the hours of solar energy production, allow people to work later, improve safety, and boost crop growth. They planned to test the concept in April 2026. (You can find that posting HERE.) Now, space.com reports that they want to place 50,000 orbiting mirrors that are three times larger than the original plan. Are we facing the end of the night sky?

Adding to the Reflect Orbital proposal, in January, Elon Musk’s SpaceX announced plans to launch one million power-hungry data centers into space, where they can utilize solar energy. The U.S. Federal Communications Commission (FCC) must approve these plans, which they appear to be fast-tracking. Astronomers worldwide are alarmed.

Robert Massey, deputy director of the Royal British Astronomical Society (RAS), objected that these proposals are “absolutely the destruction of a central part of human heritage.” He said, “It would absolutely transform our view of the sky.” RAS and many other research organizations are filing objections with the FCC.

According to Massey, the night sky would be three times brighter because of Reflect Orbital’s sun-reflecting mirrors, and dark-sky sanctuaries where astronomers place their telescopes would be lost. The SpaceX data centers would not be as bright as the mirrors but would still be visible to the naked eye. Astrophysicist Noelia Noel at the UK’s University of Surrey said, “While innovation in satellite technology brings clear societal benefits, scaling to hundreds or even millions of bright objects—or deliberately illuminating the Earth from orbit—risks fundamentally altering the night sky. This would have profound consequences not only for astronomy but also for ecosystems, our cultural heritage, and our collective relationship with the cosmos.”

When the psalmist David admired the night sky, he had no satellites or solar reflectors to get in the way as he wrote, “The heavens declare the glory of God; the skies proclaim the work of his hands. Day after day, they pour forth speech; night after night, they display knowledge. There is no speech or language where their voice is not heard. Their voice goes out into all the earth, their words to the ends of the world.” (Psalms 19:1-4) I pray that we will always be able to be in awe of the night sky and see the message of God’s glory it conveys.

Reference: space.com

March 25, 2026March 25, 2026

The Benefits of Sunlight

It’s springtime, and one of the great things about this season is that it gives us more daylight hours. The benefits of sunlight and its warmth help plants grow, making everything feel new. In Genesis 1:14, we read that God cleared the air to make the lights in the sky visible, so they could separate day from night and serve as signs for seasons, days, and years. Animals rely on the Sun, Moon, and stars to know when to breed and when and how to migrate. Plants need sunlight for photosynthesis, which produces oxygen that humans and animals need.

The benefits of sunlight include both our physical and mental health. Sunlight regulates our circadian rhythm, the biological clock that controls sleep, appetite, and hormone production. Daylight boosts serotonin levels, signaling it’s time to wake up. Spending time outside in the sunlight helps our bodies produce vitamin D, which may help protect against dementia, type 2 diabetes, and other chronic illnesses.

After a long, dark winter, going outside to enjoy the sunshine and fresh air makes us feel refreshed. Even sitting near a window with sunlight streaming in improves our mood. Light therapy is sometimes used to treat depression, especially seasonal depression during the winter months. While we consider the benefits of sunlight, we need to remember that excessive direct exposure to ultraviolet light can lead to skin cancer, cataracts, and macular degeneration.

Genesis 1:15 states that the “lights in the expanse of the sky” were meant to “give light on the earth.” John 1:4-5 tells us Jesus came to bring true light to the world. We could not live without the benefits of sunlight, and I wouldn’t want to live in a world without Jesus, who came to bring us light and life. John also reminds us that Jesus created the light and everything else that exists. (See John 1:1-14.)

March 23, 2026March 22, 2026

Knee Joint Design in Humans

One common criticism used by atheists against the existence of God is the so-called “poor design” of the human body. They criticize many areas, with the knee joint often being a focal point. In reality, a healthy knee joint has an impressive range of motion and can last for decades without significant wear. No human-engineered prosthetic knee can match this longevity. Even with the best available materials, all prosthetic knees tend to show signs of wear after just a few years.

One of the leading critics of the human body’s design is Nathan H. Lents, a scientist, author, and professor affiliated with the City University of New York (CUNY). He is especially critical of the knee joint. As an advocate for human evolution, he claims, “The problem is due to incomplete adaptation.” He states, “The anatomical adaptation to upright walking never quite finished in humans. We have several defects that are the result of the failure to complete the process… The ACL is vulnerable to tearing in humans because our upright bipedal posture forces it to endure much more strain than it is designed to.” It’s interesting that he used the word “designed,” even though he does not believe it was designed. He believes it simply evolved through natural selection acting on random mutations.

The truth is, the human knee functions as what engineers call a floating joint because it has no fixed center of rotation — it is free to rotate and roll. It is stabilized by ligaments, including the anterior cruciate ligament (ACL) and the posterior cruciate ligament (PCL). These ligaments work together with the femur and tibia to form a four-bar linkage mechanism. Professor Lents refers to people tearing the ACLs. However, the ACL is not a bad design. Injuries to it are uncommon in everyday life but are more frequent in high-impact sports such as soccer and ski jumping. Sports like tennis or skating generally do not pose a significant risk to the ACL.

Being overweight is another common factor contributing to knee problems. In the United States, more than two-thirds of adults are overweight, and one in three is obese. Just ten extra pounds of weight can add approximately sixty pounds of force to each knee during running. Obese individuals are twenty times more likely to require a knee replacement than those who are not overweight.

In reality, the knee joint is an ingenious design, as you can see in the illustration. Engineer Stuart Burgess explores this in detail in his excellent book, Ultimate Engineering. Many who view the human body as a product of evolution assume it is poorly designed without understanding the facts. God has created the human body with many remarkable engineering features, including our knee joints. Truly, ultimate engineering requires an Ultimate Engineer.

March 19, 2026March 18, 2026

Impact of Marijuana on Neurological Development

Widespread marijuana use in the Western world has not been around long enough for its effects to be fully understood. Alcohol has been used much longer, and its destructive effects are well-documented. We are concerned about the impact of marijuana on neurological development in youth. Your author lives in a marijuana hub. Currently, in Buchanan and Niles, Michigan, there are 26 marijuana shops of various kinds. We see license plates from Michigan, Illinois, Indiana, and Wisconsin belonging to those purchasing marijuana and vape products.

Scientific data on the long-term effects of marijuana are starting to emerge. A recent study tracked the marijuana use of 460,000 young people in California from early adolescence until age 25. It revealed a significant impact of marijuana on neurological development. Thirty-three percent of users developed depression, and twenty-five percent needed treatment for anxiety. Compared to non-users, teens who used marijuana had much higher rates of bipolar disorder and schizophrenia.

Dr. Lynn Silver, a pediatrician at the Public Health Institute, explains that marijuana significantly affects brain receptors, and she hopes their study will encourage kids to think twice before they vape or eat a gummy. She states, “With legalization, we’ve had a tremendous wave of the perception of marijuana as a safe, natural product to treat your stress with. That is simply not true.”

First Corinthians 3:16 says, “Do you not know that you are the temple of God, and that the Spirit of God has His home in you? If anybody desecrates the temple of God, God will bring them to ruin, for the temple of God is holy, which temple you are.” We see this principle playing out today in the impact of marijuana on neurological development in young people.

References: The Week for March 20, 2026, page 21, cedclinic.com, and healthday.com

March 18, 2026March 17, 2026

Manufacturing Spider Silk

While working to create strong materials, human engineers haven’t come close to matching what spiders can produce. Spider silk is five times stronger than steel by weight. Besides its strength, spider silk is elastic, and because it is organic, it can be disposed of easily without harming the environment. Years of research have brought scientists closer to their goal of manufacturing spider silk.

The secret to spider silk’s strength lies in special proteins called spidroins and how they are spun into fibers. National Geographic magazine explored ways that spidroins might be used, including medical applications. Since spider silk is organic, it can be used for wound dressings, and spidroin nanocapsules could carry molecules that stimulate the immune system into the body and release them gradually. Gels based on spidroins could coat catheters and surgical meshes to reduce infections and blood clots.

Because of its strength, spider silk could be used to produce bulletproof vests and durable fabrics. The challenge is producing spider silk on a commercial scale because spiders that are kept together tend to be cannibalistic. The solution is to genetically modify silkworms to produce spider silk. China has large mulberry plantations where silkworms feed on mulberry leaves and spin cocoons. Using the CRISPR-Cas9 gene editing tool, silkworm eggs can be altered to produce much stronger spider silk. Research by a Michigan-based company is nearing the point of manufacturing spider silk, or “supersilk.”

Producing spider silk biologically requires a complex molecular structure and a spider’s intricate spinning process. This exemplifies how the natural world reflects wisdom and intelligence, not an accidental creation. Technicians at Kraig Biocraft Laboratories in Lansing, Michigan, have spent 20 years trying to engineer silkworms to spin spider silk. Human engineers aim to develop new products by copying some of what God has created.

The story of the “Tower of Babel” in Genesis 11:1-14 shows that human pride has a long history, yet many still fail to see evidence for God in His creation (Romans 1:20). Throughout the natural world, God’s intelligence is displayed openly, and spider silk is just one example.

Reference: The March 2026 issue of National Geographic magazine, pages 23-41, and nationalgeographic.com.