One Daily Drink Can Shrink Your Brain

One Daily Drink Can Shrink Your Brain

A new study in the U.K. shows that even light alcohol consumption harms the human brain. The study involved more than 36,000 participants between 40 and 69. The conclusion was that as little as one daily drink can shrink your brain.

Many studies have shown that drinking alcohol has long-term effects on cardiovascular and brain function. Chronic excessive alcohol consumption contributes to health problems such as cardiovascular disease, cancer, accelerated aging, and malnutrition. However, some earlier studies suggested that limited alcohol consumption might benefit your health. The researchers involved in this study wanted to determine the effect of small to moderate alcohol consumption. The results were surprising.

The 36,678 participants reported their alcohol consumption, and the researchers performed an MRI scan on their brains. Researchers grouped the subjects by average daily intake of one, two, or three or more alcohol units–or none. A unit was about eight ounces of beer or three ounces of wine. The researchers adjusted for age, genetic ancestry, and sex.

Those who consumed even one alcohol unit per day showed noticeable differences in the brain structure, especially in the brain stem, putamen, and amygdala. Those areas regulate heart rate, breathing, learning, motor control, and processing of emotions. The regions of white and gray matter in the brain shrank exponentially with increased alcohol consumption. The brain’s gray matter is that area that processes information, and the white matter enables communication between gray matter regions. One daily drink can shrink your brain, leading to decreased cognitive ability.

The more units of alcohol consumed, the more significant were the differences compared to those who drank no alcohol. For example, for people who reported drinking three alcoholic units per day, their brains appeared to be 3.5 years older than those who drank none. For those who drank four units, their brains aged by ten years.

Interestingly, the U.S. National Institute on Alcohol Abuse and Alcoholism recommends that men limit their consumption to two drinks per day. This study shows that one daily drink can shrink your brain. So the bottom line is that if you want your brain to stay young longer, avoid drinking alcohol altogether.

— Roland Earnst © 2022

You can read the complete study with charts on Nature Communications at THIS LINK.

Diatoms Are Essential for Life on Earth

Diatoms Are Essential for Life on Earth
Electron Microscope View of New Diatom Species Epithemia pelagica

We seldom think about the importance of microscopic organisms. Diatoms are essential for life on Earth because they generate 20-30% of the oxygen we breathe. They are single-celled algae with a cell wall made of silica. In March 2022, the National Science Foundation announced the discovery of two unique diatom species in the waters around Hawaii.

Diatoms live in the oceans and waterways. You may be familiar with diatomaceous earth, which has many commercial uses, including pest control in organic gardening. It consists of the empty silica shells that diatoms leave behind. In addition to generating oxygen, diatoms are essential for life as part of the food chain in the oceans.

Like green plants, diatoms need nitrogen to grow. Marine diatoms thrive in nutrient-rich ocean areas such as the Gulf of Mexico. However, the open ocean waters around Hawaii lack significant nitrogen nutrients. Ocean waters contain dissolved nitrogen gas, but the diatoms can’t use it. These two species of diatoms solve that problem by having a symbiotic relationship with nitrogen-fixing cyanobacteria. These bacteria do not contain chlorophyll for photosynthesis, but they can extract nitrogen from ocean water and convert it to ammonia. In turn, the diatoms can use the nitrogen from the ammonia. In a symbiotic relationship, the newly discovered diatom species take the nitrogen-fixing bacteria into their shells to nurture their own personal nitrogen generators.

We have mentioned many symbiotic relationships before, but here is a microscopic one. Diatoms are essential for life because they provide much of the oxygen we breathe. This symbiotic relationship between diatoms and bacteria is another example of God’s wisdom and design for life. Everywhere we look, we see that God has designed and implemented systems that sustain life in all kinds of environments.

— John N. Clayton © 2022

Reference: National Science Foundation

The Incredible Journeys of Birds

The Incredible Journeys of Birds - Ruby-throated Hummingbird
Ruby-throated Hummingbird

One of the great examples of design that we see in the natural world is the ability of birds to migrate thousands of miles from one area of the world to another. In the past, we have reviewed several of these incredible journeys of birds.

Bar-tailed godwits hold the record, with some individuals traveling over 8100 miles without food or rest and covering 7000 miles one way in nine days. We are also amazed by Hudsonian godwits, arctic terns, and many other birds. Even the Ruby-Throated Hummingbird is amazing, flying 600 miles across the Gulf of Mexico non-stop with wings beating 50 times per second.

Our knowledge of bird migration has improved with the advent of microchips and new technology to track movements and analysis of bird DNA. Even so, there are still unanswered questions. For example, how do birds prepare their bodies for flight? How do birds know when to migrate? How do migrating birds find their way? How do birds sleep on long migratory flights? These are just a few of many questions researchers are looking to answer about the incredible journeys of birds.

The National Audubon Society published a special issue of their excellent magazine for spring 2022. This issue is the best we have seen on the design and behavior of birds. It is impossible to read through this magazine and not be impressed with the wisdom and design built into the world of birds. It also challenges us to realize the importance of caring for God’s creatures as human encroachment threatens many birds’ survival.

In Job 39:13-18 and 26 – 30, God challenges Job to understand His creation, including birds. Scientists are still feeling that challenge today. We are just beginning to know how much design is built into the incredible journeys of birds.

— John N. Clayton © 2022

For more on this go to audubon.org or read their article on bird migration.

Methane and Life on Other Planets

Methane and Life on Other Planets

Astronomers are constantly looking for signs of life on other planets or moons. One of the potential clues they seek is methane, a hydrocarbon gas consisting of one carbon atom and four hydrogen atoms. It is classified as a “greenhouse gas” because it can trap heat on Earth’s surface resulting in “global warming.” It’s a more effective greenhouse gas than the much-discussed carbon dioxide. Methane is produced by organic decomposition and in the digestion process of ruminants such as cows and other animals. Scientists seek to learn more about a possible connection between methane and life on other planets.

Since living things create methane, scientists regard it as a potential “biosignature” indicating life on an astronomical body. For that reason, astronomers are searching for methane on planetary bodies. News reports have sometimes gone overboard with stories about methane and life on other planets. However, not all methane is created biologically. Volcanic eruptions can release methane gas, and even asteroid impacts can add methane to a planet’s atmosphere. So how can scientists tell if the methane is a sign of life on a body far out in space?

For one thing, gasses from a volcano would contain not only methane but also carbon monoxide. The biological creation of methane would consume carbon monoxide. When examining the gasses in a planet’s atmosphere, a large amount of BOTH methane and carbon monoxide would probably indicate that the methane was not a biosignature. Methane alone would be a more likely indicator of the possibility of life.

However, an abundance of methane without carbon monoxide would not prove the existence of life on a planet. As we have said before, many factors are required to make a planet suitable for any kind of life, especially advanced life. NASA’s James Webb telescope, launched in December, is still working to reach full functionality. When it does, a significant part of its purpose will be to look for methane in the atmosphere of exoplanets.

When results indicate that the Webb telescope has detected methane on a planet, news reporters may sensationalize the facts to suggest more than they deserve. Reputable scientists are more cautious in their predictions about methane and life on other planets. Nevertheless, we are excited about the possibility of learning more about the universe with the new Webb space telescope.

As we have said before, the Bible doesn’t tell us if there is life on any other object in space. If there is, we believe that God put it there. We are not afraid of scientific investigation because the more we learn about the creation, the more we stand in awe of the Creator.

— Roland Earnst © 2022

What Syzygy Means

What Syzygy Means

Syzygy is an interesting word used in astronomy. It’s a great word for Scrabble, but my kids quit playing with me when I used it once. You might wonder what syzygy means. Let me explain.

This spring brings an unusual view of the solar system. If you get up before the Sun now through May, look to the east, and you will see four planets that shine very brightly. The planets from left to right are Jupiter, Venus, Mars, and Saturn. All of them will be bright enough to see with the naked eye. With binoculars or a small telescope, you will also see some of the moons of Jupiter and Saturn. Astronomers call an alignment of planets like this a syzygy.

We can see these planets in this rare alignment because they orbit the Sun in the same plane, called the ecliptic plane. This is not just some happy accident but is a critical factor in the survival of life on Earth. Objects coming into the solar system along the ecliptic will not collide with Earth because the planets that lie further out in the solar system will intercept them long before they can reach our planet.

We have actually seen Jupiter intercept a comet coming toward the Sun along the ecliptic. The fireball the impact produced was larger than Earth’s diameter. This solar system design is so complete that the gravitational fields of the outer planets overlap so that nothing from outside the solar system can get to the Earth. The only “planet” not in the ecliptic is Pluto, which is inclined to the ecliptic. For that reason, scientists say that Pluto is not a planet but a captured object.

The design of the solar system is far more complex than most of us understand. The more we travel in space, the more we see the effect of not having a designed protection system. As science deals with space travel, the wisdom and planning of God become apparent. Take a few minutes on a clear morning before the Sun comes up to go out and look and wonder at how “The heavens declare the glory of God” (Psalms 19:1). Now you know what syzygy means, and you can use it the next time you play Scrabble.

— John N. Clayton © 2022

References: apod.nasa.gov for April 20, 2022, and earthsky.org.

Return of the Lyrid Meteor Shower

Return of the Lyrid Meteor Shower

In late April each year, we see the return of the Lyrid meteor shower. It may not be the most spectacular meteor shower of the year, but I find it easier to observe. That’s because, in our part of the world, it comes at a time when the weather is mild enough to sit outside and watch (unlike the Geminids in December) and before mosquitoes become a problem (as with the August Perseids shown in the picture).

This year, the return of the Lyrid meteor shower is from April 14-30, with the peak on the night of April 22. Typically, the Lyrids display five to 20 meteors per hour at the peak, although, in some years, the number has been higher. Written records of the Lyrid meteor shower go back 2700 years when Chinese astronomers made note of it in 687 B.C. A Korean account from A.D.1136 says that “many stars flew from the northeast.”

If you see the Lyrid meteor shower, you will not be looking at falling stars, although you may get that impression. Instead, you will see tiny fragments of Comet Thatcher (officially C/1861 G1), discovered in 1861 by amateur astronomer A.E. Thatcher. That year was the last time the comet flew by our planet at 31.1 million miles (50.1 million km). Its next return to our vicinity will be sometime around the year 2280. Meanwhile, Earth’s orbit around the Sun causes us to pass through debris the comet left behind. So we see those fragments as they burn up from the effect of atmospheric friction.

We live in an orderly universe on a planet positioned to allow observation and study of the cosmos. Our planet is designed with an atmosphere and magnetic field to protect us from comet debris, meteorites, cosmic rays, and solar wind. If you have the opportunity to observe the return of the Lyrid meteor shower, use it as a time to thank the Creator for allowing us to live in the just-right time on a just-right planet in a just-right location in the universe.

— Roland Earnst © 2022

Faith and Evidence Go Together

Faith and Evidence Go Together

We get mail from people who suggest that if you accept science and evidence, you have demeaned God. “You just have to have faith,” one person wrote, “and saying that you need evidence devalues God.” I take strong exception to this claim on many levels, but my main objections are that it contradicts the Bible and eliminates evangelism in today’s world. Hebrews 11, “the faith chapter,” describes the faith of heroes of the Old Testament, including Abel, Enoch, Noah, Abraham, Sarah, Isaac, Jacob, Joseph, Moses, and Rahab. Let’s consider the connection between their faith and evidence.

For example, how did Moses get his faith? Did he come out of a vacuum and just have faith? Remember that his mother raised him and taught him about his people. What about the evidence of the burning bush and the staff that became a snake? Remember his discussions with God that gave him the courage to confront Pharaoh. What about the plagues in Egypt, the crossing of the Red Sea, the brass serpent, and receiving the Ten Commandments on Mount Sinai? Were those not evidence?

Also, read the story of Abraham and notice how many times God reassured him and how much evidence he saw before that near-sacrifice of Isaac. Using Hebrews 11 to justify violating the teachings of the New Testament is not only unwise, but it is also a violation of the teachings of the apostles. Faith and evidence are closely tied together in the New Testament.

For example, 1 Peter 3:15 tells Christians to “be ready to give an answer for the hope that is within us to anyone who asks.” Romans 1:20 tells us we can “know there is a God through the things He has made.” Jesus set the example with Thomas, who at one time had been the strongest of the apostles (See John 11:16) but saw his faith collapse at the death of Christ. How did Jesus deal with this incredible failing in Thomas? Did He condemn him or cast him off as a weakling? Read John 20:24-29 and see how Jesus encouraged Thomas to examine the evidence.

Someone might refer to Acts 2-3, where people, in less than a day, gave their lives to God.
Realize that God had been preparing that “soil” for thousands of years, and Jesus had been planting and nurturing it for three years. Today the voices of atheism, agnosticism, skepticism, materialism, and paganism are louder than ever. We cannot withdraw into our cocoon of church buildings and not do what God has called us to do.

Read Acts 17 and see how Paul dealt with the philosophers and skeptics of his day. He didn’t call them to blind faith. Instead, he gave them evidence of “the God in whom we live and move and have our being.” Faith and evidence go together. We must use evidence as Jesus and the Apostles did, or our numbers will continue to shrink as we lose our children and grandchildren to Satan.

— John N. Clayton © 2022

Learning About Lepidopterans

Learning About Lepidopterans - Monarch

One of the joys of life is the ability we all have to learn beyond school or college. Learning often happens when we contact someone who knows a lot about a subject we have never studied. For example, we recently visited the Marine Discovery Center in New Smyrna Beach, Florida, where we met specialists in butterflies and moths. So naturally, we were interested in learning about lepidopterans.

The order Lepidoptera includes butterflies and moths, and we learned that there are 2932 species of these insects in Florida. Studies have revealed incredible details about these creatures’ surprising complexity and design. The word “lepidoptera” means “scale wings,” and these creatures have microscopic scales on their wings. They have four wings – a pair in front and a pair in the back. Their bodies have three parts, a head, a thorax, and an abdomen with three pairs of jointed legs attached to the thorax.

Butterflies and moths taste with their feet, which means when they land on something, they immediately know whether it is food or not. These creatures breathe through tiny valves on the sides of their abdomen called spiracles, and they eat through a long tube called a proboscis. Butterflies are active during the day, and moths are active at night, with very few exceptions. Coming out of their heads between their eyes are antennae. In butterflies, the antennae are club-shaped, and in moths, they taper to a point. When a moth attaches to a surface, sensitive cells detect moisture, temperature, and exposure to the wind and rain.

Butterfly antennae have cells sensitive to the pollen of whatever plant its caterpillars need to survive. Each butterfly has a particular sensitivity to a specific plant or group of plants. For example, monarch butterflies are sensitive to milkweed. Farmers know which butterflies produce caterpillars that eat certain crops. In the natural world, the caterpillars of moths and butterflies are food for many larger creatures. When humans eradicate those predators, we upset the balance, causing problems for humans. Learning about lepidopterans and the environment is essential for understanding how to maintain balance. God did not design butterflies and moths to be destructive, but when we mismanage the environment, the result is a problem for humans raising crops.

The complexity of butterflies and moths is impressive. They have their larval ability to eat plants and produce silk to make a cocoon and morph into adults with the beautiful colors and designs of wing scales. Learning to control the destructive nature of caterpillars requires an understanding of the complexity of these remarkable creatures. Without the help of mature insects as pollinators, many other plants would suffer. Learning about lepidopterans shows us God’s excellent design of life.

— John N. Clayton © 2022

The Event to Remember

The Event to Remember - Empty Tomb

Today, we think once more of the event to remember which we described in this post from five years ago.

Early on the first day of the week, some women came to the tomb where the lifeless body of Jesus had been placed. It was empty. It had been opened–not by any human hands but by an angel. It wasn’t opened to let Jesus out. The tomb was opened so that people might see that it was empty. The followers of Jesus were not expecting him to be alive again. At first, they couldn’t believe it. Powerful people tried to find the body or to convince the public that it had been stolen. But they could not.

Now, over 2000 years later, there are still those who try to deny the resurrection. The evidence is there. The friends of Jesus were not expecting the resurrection, but after they had seen him alive, they spent the rest of their lives telling others about it. Even when they were tortured and killed for preaching the resurrection, not one of them ever recanted. Without a body, the powerful enemies of Jesus could not disprove the resurrection.

In 1 Corinthians 15:3-7, written only a few years after the resurrection of Jesus, the Apostle Paul recorded what scholars believe was an oral tradition of the resurrection appearances dating back to the very time of the resurrection. If it had not been true, this tradition and Paul’s record of it would have been debunked by the eyewitnesses who were still around. It was true, and the resurrection of Jesus Christ is the most solidly attested event of ancient history. The world will never be the same because of the day when Jesus Christ conquered death.
–Roland Earnst © 2017

Waiting for the New Day

Waiting for the New Day - Joseph's Tomb

As we are waiting for the new day, we want to share this post from five years ago.

Joseph of Arimathea was a wealthy man who had a new tomb carved into a stone hillside. This was not a pauper’s grave. Only the rich and powerful could afford such a burial place, and it was soon to become a temporarily borrowed tomb.

The first man to use it was not a wealthy man. He grew up as the son of a carpenter and had no home to call His own. He had a small group of friends who deserted Him at the last minute. His thousands of admirers quickly sought to get rid of Him when He didn’t overthrow the Romans as they expected.

A few days after they greeted Him with shouts of praise and honor, they were begging the Romans to put him to death. His lifeless body was placed in a rich man’s tomb because the rich man named Joseph stepped out of the shadows and loaned his tomb to Jesus. “Loaned” is the appropriate word, because Jesus would not need it for very long. This was a temporarily borrowed tomb. A miracle was about to happen!
–Roland Earnst © 2017