science Archives

August 13, 2020August 12, 2020

Magnetotactic Bacteria Finding Their Way

Before GPS, people found their way with a compass. Many still do. Did you know that finding your way is possible, even if you don’t have any eyes or ears, or even a brain, as long as you have a compass? Magnetotactic bacteria (MTB) use the magnetic field of planet Earth to know which way to go. To do that, they have to build a compass. Realize that these are single-cell organisms that live in marine or freshwater habitats.

Inside the cells of all living things, there are subunits called organelles that perform various functions. MTB have organelles called magnetosomes that contain magnetic crystals. They build the magnetosomes by digesting iron and combining the iron with sulfur to form iron sulfide or with oxygen to form iron oxide. The iron oxide is also known as magnetite, and it’s a powerful magnet.

The bacteria form chains of these magnetic crystals inside their cells. The magnetosome chain acts as a compass needle aligning the MTB to Earth’s magnetic field. In this way, the magnetotactic bacteria can “know” the direction to move. Why do these bacteria need to know directions? They are anaerobic bacteria, meaning that they survive without oxygen. Oxygen can be deadly to them, so they need to find an area away from it. Rather than blindly going around in circles looking for a safe place, they move in a straight line to their anaerobic safe zone.

In 1963, an Italian scientist first noticed certain bacteria aligning and moving in the direction of the north pole. It wasn’t until 2007 that scientists paid much attention to that observation. Without eyes, ears, or a brain, magnetotactic bacteria can find where they need to go. But without a brain, how can they know to do this? And how can a single-cell bacterium build the magnetosome organelles? These magnetic crystals are difficult for humans to create in a laboratory. In fact, scientists have found that the magnetite produced by bacteria is better for some applications than what the scientists can produce in the laboratory. For that reason, they are looking to find a way to mass-produce MTB to obtain their magnetosomes.

Who taught the magnetotactic bacteria this fantastic skill? Did one of them figure it out and then pass that knowledge on to future generations? We don’t think so. A better explanation is that the Master Designer programmed the skill into them.

You can read a scientific paper on MTB at THIS LINK. Leading evolutionary biologist J.B.S. Haldane (1892-1964) once said that if you could find a magnetic mechanism as part of a living organism, it would disprove evolution. You can read more about Haldane and his statement at THIS LINK.

July 31, 2020July 30, 2020

Science and COVID-19

There are many lessons to be learned from the COVID-19 pandemic. One of the most tragic of these lessons has been the vilification of science. Many politicians and preachers have acted as if science is something to be opposed and feared. Many of our national leaders view science as an enemy of the economic welfare of the United States. Some preachers have portrayed science as an attempt of Satan to shut down the Church and prevent Christians from meeting together. What is the truth about science and COVID-19?

The first problem here is a failure to understand what science is and how it works. Webster’s Dictionary defines science as “systematic knowledge.” Knowledge is simply an understanding of facts. God gave Israel into the hand of the Babylonian king Nebuchadnezzar. One of the first things Nebuchadnezzar did was to separate the best of the children who were “well-favored, and skillful in all wisdom and cunning in knowledge, and understanding science” and take them to Babylon (Daniel 1:3-4). This led to Daniel becoming a huge asset to Israel.

The Psalmist repeated over and over that scientific information builds faith. Psalms 19:1 says, “The heavens declare the glory of God, and the sky shows His handiwork. Day unto day utters speech and night unto night shows knowledge.” Psalms 119:66, and 139:6 praise knowledge. Proverbs 1:22 and 1:29 talk about people who hate knowledge. Colossians 2:3 tells us that God has within Him all the treasures of wisdom and knowledge. Peter admonished Christians to escape corruption and add to their faith virtue and knowledge (2 Peter 1:5-6).

In 1 Timothy 6:20, Paul tells Timothy to “keep that which is committed to your trust, avoiding profane and vain babblings and oppositions of science falsely so-called.” There is a vast difference between knowledge and babblings or oppositions. Science deals with the facts of the COVID-19 virus. How we respond to what we know of the facts is up to each of us.

Science tells us to practice social distancing or wear a mask. The motivation behind rejecting those health practices are worldly pleasures and greed. Trying to test God by expecting Him to void the logical consequences of our actions is like handling snakes or drinking poison.

God never promised Christians immunity from all the problems in the world. If that were the case, people would become Christians to avoid problems, not because they love God. We need to use our God-given intelligence to make good decisions with the knowledge we have about science and COVID-19.

July 25, 2020September 25, 2020

Phalaropes Spinning for Food

Many times we see animal behavior that seems impossible to explain. We see an interesting example of that in wading shorebirds called phalaropes. These birds can get food that is too deep in the water for them to reach.

Instead of the typical methods used by shorebirds to capture their food, phalaropes take a different approach. They spin around and around in one place at the breakneck speed of one complete rotation a second. They kick seven to eight times on each spin and move their heads to where they can quickly snap up food. Researchers have found that these birds can detect prey, thrust and seize with their bills, transport and swallow the prey, and do it all in half-a-second.

Using high-speed photography, researchers found that the phalarope creates a vortex that is over three feet deep. The vortex acts as a miniature tornado bringing food up to where the bird can reach it. You could understand how one bird might learn this skill, but it seems to be genetically implanted as baby birds do the spinning even when they have had no contact with adult birds.

We see in phalaropes, as in most animals, that God has given them a genetically-based technique for acquiring food so they can survive.

For a video of the process, click HERE.

July 22, 2020July 22, 2020

Lessons from Prince Rupert’s Drop

As an old physics teacher, I always had a few “tricks” up my sleeve to throw at my students when they looked like they might be dozing off. Here is one that was usually a part of our studies of kinetics and the laws of solids, liquids, and gases. Prince Rupert’s drops are glass tear-drop shaped beads with a tail. In Hawaii, these drops occur naturally and are called Pele’s tears in honor of the volcano goddess Pele. My students learned lessons from Prince Rupert’s drop, and perhaps you can too.

In 1660 Prince Rupert of the Rhine introduced the drops to English scientists. The drops are made by quickly dripping very hot glass into water. As the glass cools, it becomes hard and clear. The bead part can withstand 3400 pounds (15,000 Newtons) of force. You can hit it with a hammer and it won’t break. The tail of the drop is very thin, and you can easily break it. The result is that the entire bead violently explodes into millions of dust-sized fragments.

If a student were dozing off, I would do my old “A or F” trick. I would tell the student if they could break the tail off the glass bead they would get an A, but if they broke the bead or scratched it in any way they would get an F. With the class watching, the student would carefully break off the tip, and to their surprise, the tear-drop would explode. Then the rest of the students would want to try it, leading to lessons from Prince Rupert’s drop.

The physics behind this is fascinating. The glass behaves as a liquid according to Pascal’s Law, which says, “Pressure exerted on a fluid is distributed uniformly throughout the fluid.” Because the tail has a very small diameter, the pressure exerted on the tail is beyond the tensile strength of the glass. The modulus graph for this material is very strange, with the glass not bending or stretching and thus having no elastic limit. We can see glass behaving as a liquid in other cases. Windows in old houses tend to flow so that the windowpane is thicker at the bottom than at the top. Scientists have learned lessons from Prince Rupert’s drop that gave us toughened glass for the screens in today’s phones and tablets.

We can also learn some lessons from Prince Rupert’s drop. One is that things are not always what they appear to be. The drops are beautiful. Shining a laser into them produces interesting light patterns. The bulb of the drop seems to be indestructible, but a small change in the tail produces wholesale destruction in the entire thing. What was once a beautiful tear-shaped drop of glass is now a pile of powder.

The moral challenges that we all face are very much the same. Things are not always what they appear to be. Something beautiful can become an ugly pile of dust if it has even a single break in any part of it. Sex is beautiful and used as it was designed to be, it can bring great joy and love. One misuse of it can turn a life into an ugly thing that can’t be put back together by any physical process. Only the healing that Christ brings can restore the beauty of a broken sexual relationship.

You can see a video demonstration of Prince Rupert’s drops by clicking HERE.

July 3, 2020July 1, 2020

Fast Radio Bursts and the Cosmos

Those of us who are interested in the subject of creation have been excited about some new data which will help us understand the cosmos. Apparently God has built into the creation various devices to help us more clearly see what He has created. Among those devices are fast radio bursts (FRBs).

When high mass stars draw in matter, they emit various frequencies of radio waves. Neutron stars and black holes release radio waves in a wide range of different energies. High energy waves travel through space without being affected a great deal by anything. Lower energy radio waves are affected by whatever material they pass through. Recent research has shown that in interstellar space there are variations in the actual speed of radio waves coming from a common source, depending on how much intergalactic material the waves are going through.

The material that slows the radiation is the ordinary particles called baryons, including protons and neutrons. We now know that interstellar space is full of the matter that makes up our galaxy, but at a very low density. These microscopic baryons do not emit light so we have not been able to detect their presence in the past. Fast radio bursts can make it possible for us to observe them because of the effect they have on the speed of the radiation.

Astronomers know from observing the light that was emitted when the universe was young that baryons should be the source of five percent of all the mass and energy in the cosmos. If that was true at the beginning, it should also be true today. However, the stars and gas we can see only account for half of that amount. The baryons are not uniform or isotropic in their distribution, but rather exist as filaments making a sort of web of low density matter which can be measured using FRBs. Astronomers are optimistic that this discovery will account for the “missing mass” in the creation. (This is the missing mass of regular matter, not dark matter, which is still a mystery.)

When the Bible challenges us to “know there is a God through the things He has made (Romans 1:20), it implies that this process is ongoing. In the 21^st century we are blessed with new and better tools to see what God has made. Like the microscope, fast radio bursts open whole new vistas for us so that we can see and understand more of the handiwork of God.

Reference: Science News , June 20, 2020, page 6, and Nature.com

July 1, 2020June 30, 2020

What Is Falsification and How Does it Relate to Faith?

We see misunderstandings of the question of falsification by both atheists and religionists. What is falsification, and how does it relate to faith in God?

Let us begin this discussion by giving a simple definition of falsification. The Falsification Principle, initially proposed by Karl Popper, is a way of demarcating science from non-science. It suggests that for a theory to be considered scientific, it must be testable and falsifiable. For example, the hypothesis that “all swans are white,” can be falsified by observing a black swan.

It always disturbs me to read a religious writing that claims scientific proof that a faith healer accomplished a miracle cure. An excellent example of this was William Nolen’s studies reported in a book titled In Search of A Miracle released in 1975. Nolen investigated the claims of faith healers Kathryn Kulman and Norbu Chen. He showed that there were observable, natural explanations for what had been called “miracles.” Nolen believed he could test Kulman and Chen’s claims by investigating whether there were other explanations for their claimed miracles. There were, so they could not be scientifically proven to be true. What is falsification, and how does it relate to faith in God? You can have faith in someone, but you cannot call it science.

The scientific community is guilty of the same kind of error when it promotes an idea that cannot be tested and calls it science. It is fashionable in today’s world for scientists to propose the existence of an infinite number of parallel universes. They use this idea to explain how our universe could be fine-tuned for life. With a nearly infinite number of universes, we just happen to be in the one with all of the right stuff for life. Multiverse proposals say that quantum pops create universes and that an infinite number of pops would eventually produce every possible set of properties, including ours.

That is an interesting fantasy, but it is just that. There is no way to falsify that proposal, and so it is not scientific. Skeptics will be quick to point out that, “In the beginning God created the heaven and the earth” is also not falsifiable, and that is true. But look at the logical outcome of these two choices. If God created the universe and placed humans in it, then there is a reason there is something instead of nothing, and there is a purpose for our existence. If the faith statement of the multiverse is true, the question of why we exist remains unanswered, and any purpose for the “pops” is pure fantasy.

Romans 1:20 tells us we can know there is a God through the things He has made. The Bible, as a whole, brings us understanding that we are part of a struggle between good and evil and that God is love and wants to have a relationship with us. We can’t offer scientific proof of that, so it is a statement of faith. But it is far more full of meaning and purpose than to speak of what we see in the cosmos as “quantum pops” of something without a cause or purpose. So the question we all have to entertain is, “What is falsification, and how does it relate to faith in God?” The proposed multiverse alternative to God is not falsifiable, and therefore it is faith and not science. In what do you place your faith?

June 12, 2020June 8, 2020

Fish as Flat as a Pancake

Biologists are always finding and studying new life-forms. Among recent discoveries are fish as flat as a pancake.

How many species of biological life exist? So far, scientists have identified, classified, and named about two million. They estimate that there are somewhere between ten-million and one-hundred-million. How fast are scientists finding and describing new forms of life? About 18,000 new species are identified and given genus and species names each year. At that rate, it will take somewhere between 555 and 5,555 years to identify them all. Obviously, biologists have a lot of work left to do.

Each year, scientists identify most of the “new species” from museum specimens that were found earlier but not studied carefully. Some species in the wild are going extinct, and some of the museum specimens may already have gone out of existence. Two species that are not endangered and that were discovered in the wild in 2010 are fish “as flat as a pancake.”

Scientists discovered two species of pancake batfish in the Gulf of Mexico near the Deepwater Horizon oil spill. They gave their discoveries the genus and species names Halieutichthys intermedius and Halieutichthys bispinosus. (The picture shows the similar Halieutichthys aculeatus.) You probably won’t remember their names (or even know to pronounce them), but they play a role in the balance of life in the ocean.

Pancake batfish live on the sandy bottom of the ocean between 148 and 2,690 feet (45-820 m) below the surface. They are flat, that’s why the name “pancake,” and they cover themselves with sand to wait for prey. They eat snails, worms, clams, scallops, and other crustaceans. Their maximum diameter is about 4 inches (10 cm), and they move over the ocean floor by hopping on their fins.

We have to wonder why there are so many species. God created living things with the ability to adapt to many environments, with each one filling a niche in the marvelous system that makes our lives possible. He even gave us strange fish as flat as a pancake. Furthermore, God created us with unquenchable curiosity and plenty of things to study. We believe that we can learn more about God as we explore the creation.

May 31, 2020May 27, 2020

Measuring the Distance to Stars

Measuring the distance to stars is not as hard as you might think. As an earth science teacher at Riley High School in South Bend, Indiana, I enjoyed seeing a student’s eyes light up when they came to understand some scientific fact. They had thought it was beyond them, and suddenly it made sense. Knowing the distance to a star was always one of those facts. Let me show you how easy it is:

Look at a picture on the other side of the room. Hold your finger in front of your face and close one eye. Line up your finger and the object on the wall. Now close that eye and open the other eye, Does your finger appear to jump? If you drew a line between your eyes and extended a line from each eye to the picture, you would have a triangle. The apex angle at the picture is controlled by how far away it is from you. If you do the same experiment with an object that is closer, there will be a different angle.

The illustration on the right shows the Earth making its yearly orbit around the Sun. A line from the Earth to the Sun will establish a triangle. In six months, it will look like objects at the apex angle have moved. How much they will have moved depends on how far away they are. My classes do simulations of these measurements on the football field, and it becomes apparent how easy measuring the distance to stars can be.

The measurement unit astronomers use is based on how far away a star must be for the angle at the apex to be one arcsecond. We call that distance one parsec, and it is 3.26 light-years. If the parallax angle is .5 seconds of arc, the star must be 6.52 light-years away. The smaller the angle, the farther away the object is. The European Space Agency’s Gaia mission, which has been underway since 2013, can measure the parallax angle to a millionth of a second of arc. Objects that move such a small amount are tens of thousands of light-years away.

The cosmos is much larger than most of us can imagine. The light we see from some of those stars left the stars hundreds of thousands of years ago. Measuring the distance to stars gives new meaning to passages like Isaiah 40:22: “He stretched out the heavens as a curtain and spread them out as a tent to dwell in.”

If it has taken the light from the stars God created many tens of thousands of years to get here, it is evident that the creation didn’t happen a few thousand years ago. Verses describing the process of creation are untimed and undated. Let us not allow human traditions to challenge the integrity of the Bible. God created time, and He certainly is not limited by anything He created.

May 14, 2020May 13, 2020

Religious Anti-Science Rhetoric

For the 51 years of this ministry, we have confronted religious anti-science rhetoric. Our critics are those who feel that science is an enemy and that you can’t be a good Christian and embrace science. We are now in a period when the issue of whether people can meet together for worship services has become an issue of science and politics. Some politicians oppose churches resuming worship services saying there is strong scientific evidence that it will expose participants to the COVID-19 virus. Many religious leaders insist that this is an attempt by the government to restrict religion. They say that this scientifically-based objection is destroying the right of people to worship together.

In previous articles, we have pointed out that a great deal of ignorance is involved in rejecting science. According to the dictionary, science is knowledge. Knowledge is always neutral. The critical thing is how we use it. When new scientific knowledge gave us lasers, the question was how we would use lasers. Would they be weapons that cause massive destruction, or would they be medical tools to heal eyes?

We now understand how the COVID-19 virus spreads from one person to another. Will we use this knowledge to stop the progression of the illness, or will we use this virus to destroy whole masses of people? The bubonic plague from 1347-1351 killed 200 million people, which was nearly half of Europe’s population. Religious anti-science rhetoric today has the potential to create a catastrophe.

It isn’t our knowledge about the COVID-19 virus that is a threat to freedom or to worship. The reality is that science will eventually develop a vaccine that will allow everyone to worship together. Smallpox was killing 400,000 people a year in Europe, and it only stopped when scientists developed a vaccine. It is hypocritical for religious people to vilify science while they: 1) enjoy modern technology in their entertainment 2) go to medical facilities for treatment of disease, 3) use scientific advancements to grow and prepare their food, 4) use new scientific discoveries in their businesses, and 5) use science in their homes to improve their standard of living.

Proverbs 8 makes it clear that God has used science (wisdom) in all He has done. Psalms 19 and 139 refer to God’s creation, and Romans 1:19-20 points out that science reveals God’s existence through the things He has made. The following verses, Romans 1:21-32, point out that human moral and political choices cause the pain and destruction we see in our world.

Christianity doesn’t need to violate social distancing to worship and to practice our faith. James 1:27 defines true religion, and Jesus made it clear that He is there when just two people come together in His name (Matthew 18:20). First Timothy 6:20 tells Christians to avoid scams and religious claims called science. Ignore the religious anti-science rhetoric and know that God and science are friends. Don’t listen to politicians and religious hucksters and rely on evidence and the message of proven researchers. Join together in prayer and worship in our homes on Zoom, YouTube, Facebook, or whatever method you choose. Rejoice that, through science, God has given us new ways to come together, encourage each other, and glorify Him even in the middle of a pandemic.

Data from Discover magazine, June 2020, page 11.

April 7, 2020April 6, 2020

What Are Viruses and What Is their Purpose?

It is self-evident that we are all impacted by something called a “virus.” What are viruses, and what is their purpose?

The first clue about viruses was in 1898 when scientists discovered that the cause of foot and mouth disease in livestock was something smaller than any bacteria. Because viruses are about 100 times smaller than bacteria, they could not be detected until electron microscopes were developed in 1931. Since viruses were too small to be filtered out, scientists initially thought they were liquids. They were given the name “virus” which comes from the Latin word for poison.

Later, scientists discovered that a virus is a protein (DNA or RNA) molecule enclosed in a capsid covered by a protective layer of fat, or lipids. The virus in and of itself is inert and unable to reproduce. So what is their purpose? When they come in contact with living cells, they insert their genetic material into the host, so the cell now produces viral protein. This may produce harmful and life-threatening results. Among the illnesses generated by viruses are the common cold, influenza, smallpox, chickenpox, herpes, shingles, AIDS, polio, rabies, Ebola, and others.

If the protein is beneficial, the virus can produce a useful evolutionary change. In that way, viruses are tools to create new genetic products. In today’s world of genetic engineering, the process is called transduction. We have pointed out before that many times good things come from evolutionary change. God designed living things with the ability to change and adapt. Scientists use viruses as tools to affect desired genetic changes in agricultural products to produce high protein corn, for example. Some viruses attack bacteria, and they are called bacteriophages. As bacteria have developed resistance to antibiotics, scientists are interested in using bacteriophages as a defense against harmful bacteria.

If they are not living things, then what are viruses? They are sometimes called “organisms on the edge of life.” They are not fully living on their own, but they possess some characteristics of living things. Viruses are very fragile because the only thing protecting them is a thin layer of fat, known as lipids. If the fat is dissolved, the protein molecule disperses and breaks down on its own. That is why any soap or detergent will destroy a virus, and why washing your hands with soap and warm water is essential. Heat melts fat, so water above 25 degrees Celsius (77 degrees F) for washing clothes, dishes, or hands will destroy viruses. Any solution which is more than 60% alcohol will dissolve fat and destroy the virus, as will bleach in a 1 to 5 ratio to water. Antibiotics or bactericides do not affect a virus because they only work on living tissue. Antibiotics cannot kill what is not alive.

The problem with viruses is that when they are transferred from animals into humans, or even different animals, they can be destructive. Scientists believe that the current coronavirus (SARS-CoV-2) is active in bats where it causes no problems. When the virus jumped into humans, the result was destructive.

Then, what is their purpose? Viruses can be useful tools in their proper place. They are part of the way life continues to exist on a changing Earth. Mismanagement of animals and food can cause a virus to become an enemy of humans. We have a repeat of the Frankenstein phenomenon when a potentially useful concept turns into a monster because of misuse.

Data from: Berkeley.edu and wikipedia.org