science Archives

March 8, 2022March 7, 2022

Water Affects Earth’s Climate

One of the factors that put planet Earth in the so-called “Goldilocks Zone” of our solar system is that it is the correct distance from the Sun for liquid water to exist. Life is not possible without liquid water. Another factor we sometimes overlook is how water affects Earth’s climate.

We are approaching the end of winter with spring on our doorstep in the Northern Hemisphere. One of the familiar features of our cold winter months is ice and snow. Although we grow tired of the cold and the frozen water, the spring melting of snow and ice from mountains supplies essential water for many parts of the world. The changing seasons caused by the tilt of our planet on its axis and the way water affects Earth’s climate are factors of design allowing humans to live over most of the globe.

The Lofoten Islands in Norway are 105 miles (169 km) north of the Arctic Circle. The area is home to more than 24,000 people and has attracted millions of tourists because of its beauty. Even though it is only 1500 miles (2,420 km) from the North Pole, the area enjoys relatively mild temperatures. The warmest temperature ever recorded at the Skrova lighthouse on one of the islands was 86.7 degrees F (30.4 degrees C) in June 1972. The coldest was 4.8 degrees F (-15.1 degrees C) in February 1966. Skrova has what Norwegians call “tropical nights” when the temperature does not fall below 68 degrees F (20 degrees C).

On the other hand, the city of Yakutsk, Siberia, has a population of 336,200 people, and it holds the title of being the coldest city in the world. Some reports say the temperature has dropped to as low as -76 degrees F (-60 degrees C). The surprising thing is that Yakutsk is 280 miles (450 km) SOUTH of the Arctic Circle. That’s 385 miles south of Skrova in the Lofoten Islands. So what makes the difference?

Water largely explains the difference. The North Atlantic Current and the Norwegian Current bring warmer water to the Lofoten Islands. Also, mild low-pressure air from the Atlantic has an open path to blow northward in the winter. By contrast, Yakutsk is landlocked and located in a valley surrounded by mountains. As a result, the cold air settles into the low area and keeps Yakutsk in the freezer.

The highest and lowest temperatures on Earth tend to be in the interior of continents. This is because landmasses heat and cool much more quickly than large bodies of water. Also, landmasses covered by snow and ice reflect the warming radiation from the Sun back into space rather than warming the land.

As we have said before, water makes life possible in many ways. It is also true that water affects Earth’s climate in significant ways. Water shows design precision at the atomic and molecular levels to give it the qualities that life requires. Furthermore, water is abundant on this planet to supply our needs if we use it wisely. We think water is strong evidence of God’s design wisdom and care for His creation.

March 5, 2022March 3, 2022

Wildfires Can Be Beneficial

We have all seen the heart-wrenching pictures of people who have lost their homes to wildfires. Several years ago, we were in the area around Mount Lassen in California and saw how a very hot fire reduced a vast area to dust– including homes, cars, and electric power lines and towers. Of course, some people criticize God’s design when a wildfire devastates an area, but wildfires can be beneficial.

The National Science Foundation funded a 35-year study in Minnesota which showed that periodic wildfires can inhibit plant disease. Oak wilt is a fungal pathogen that can devastate groves of oak trees. The NSF study showed that areas that experience periodic wildfires have a much lower incidence rate of oak wilt than areas with no fires. The difference is striking, with a 765% reduction in oak tree mortality in burned areas over unburned areas.

The NSF report mentions that very little long-term research has been done on fire and plant disease interactions. We can’t blame God for poor design causing wildfires. Studies have shown that many wildfires are caused by poor human management of ecosystems. When people allow forest litter to pile up, the potential for destructive wildfires increases dramatically. How people maintain their properties contributes to wildfire damage to homes in residential areas. With climate change causing higher temperatures and severe droughts in areas with large human populations, wildfires will cause more damage.

The research shows that wildfires are a functional part of controlling invasive attacks on local plants in the natural world. So God’s design is not flawed, but human errors in managing what God has given us have brought great pain to many people. The question is whether we will learn from the past.

Science has given us tools to understand that wildfires can be beneficial in the natural world. Will we continue to promote ignorance of how the natural system works and bring tragic results to people living in areas vulnerable to wildfires?

References: National Science Foundation Research News and the journal Ecology Letters

March 4, 2022March 2, 2022

Shallow Torpor and Deep Torpor in Hummingbirds

You have probably heard that hummingbirds have such a high metabolism that they must eat constantly. On a human scale, a hummingbird would have to drink a can of Coca-Cola every minute just to stay alive. However, it isn’t just the rapid wing beat that requires so much energy, but hummingbirds must maintain their body heat so that organs like the liver and heart can function. A research team has studied the design built into hummingbirds to address this problem. It has to do with shallow torpor and deep torpor in hummingbirds.

Anusha Shankar at Cornell University and her team found that the smallest hummingbirds cool down at night to as low as 3 degrees Celsius. Shankar called that “an incredible ability.”
Hummingbirds can fall into deep torpor at night, something analogous to hibernation. They also have a shallow torpor they can use if they need to wake up quickly. In deep torpor, the hummingbirds can save an average of 60% of their energy relative to their basal metabolic rates. In addition to saving energy, when the hummingbirds are in deep torpor, they are invisible to temperature-sensing predators like snakes.

Hummingbirds sleep with their bills turned up and their eyes closed. While in deep torpor, their breathing is greatly reduced with ten-second periods when they don’t breathe at all. Researchers were impressed with the hummingbird’s energy flexibility. The birds not only have the options of shallow torpor and deep torpor while they sleep, but during the day, they can spend 80% of their time hovering or 80% of their time perching. Studies of gene expression show that genes are being turned off and on in hummingbird tissues in shallow torpor and deep torpor and when the bird is awake.

Hummingbirds are amazing creatures that show incredible complexity in their design. As we watch them around our feeders, we need to be impressed with how their bodies maintain their activity and survive the range of temperatures in their environment. It is just a reminder that “we can know there is a God through the things He has made” (Romans 1: 20). Hummingbird design speaks loudly of the truth of that statement.

Reference: American Scientist, March/April 2022 page 70.

March 2, 2022March 1, 2022

Dangerous Animals that We Fear

We see articles in magazines and newspapers telling terrible stories about dangerous animals killing humans. On planet Earth every year, 200 people are killed by lions, 500 by hippos, 600 by elephants, and 1000 by crocodiles. However, the deadliest creatures on the planet are not lions, hippos, elephants, crocodiles, or even sharks. Those numbers do not apply to most people reading this because those deaths occur in the limited areas of the world where those animals dominate.

Dangerous animals closer to home are scorpions, killing 3,300 people in the Americas. Dogs, including those that are rabies-infected, kill 59,000 humans. Snakes annually kill 138,000 people. So you might guess the top two killers of human beings. The second leading killer of humans is other humans, who take the lives of 400,000 people killed in homicides – not including suicides or war. However, the top killer of humans is mosquitos, with 725,000 people dying from diseases contracted through mosquito bites.

The list of diseases that mosquitos give to humans is massive. Chikungunya, dengue, yellow fever, encephalitis, West Nile fever, and malaria are a partial list. On the other hand, a minimum of care and prevention can avoid those diseases. For example, the mosquito that gives malaria to a human must be a female and one of the members of the Anopheles species. Also, they must have previously sucked blood from a malaria-infected human or animal.

It is easy to overlook the fact that many mosquitos are helpful pollinating insects. Furthermore, humans often create invironments where mosquitos flourish. Fields flooded to grow rice are great places for mosquito breeding. Humans have altered the natural environments, removing life forms that eat mosquitos, including in the larval stage when they live in bodies of still water.

Humans have caused many problems by invading animal habitats and altering the natural system God designed to keep dangerous animals and insects in balance. In many ways, we create our own problems. God did not create animals to hurt humans. Genesis 1:21 tells us that when God created “the moving creature that has life … and every living creature that moves … God saw that it was good.” That was God’s original design, and many of the bad things we experience are due to human ignorance, carelessness, and greed.

Reference: Data from Skeptical Inquirer March/April 2022, pages 25-26.

March 1, 2022February 28, 2022

Extreme Plant Design – Rafflesia

The world’s largest and most awful-smelling flowers grow in the rain forests of the Philippines, Malaysia, Indonesia, and Thailand. They are produced by about 28 species of plants in the genus Rafflesia. These examples of extreme plant design have the odor and even the appearance of rotting flesh.

Rafflesia are parasitic plants that grow under the bark of woody vines in the genus Tetrastigma. The vines of Tetrastigma are also parasitic plants that use host trees to reach sunlight for photosynthesis. So you could say that makes Rafflesia plants parasites of parasites. Rafflesia plants grow inside the Tetrastigma vines so that their only visible part is the flower. They have no roots or stems.

The Rafflesia flowers have five petals and can be 40 inches (100 cm) or more in diameter and weigh 22 pounds (10 kg) or more. Because of the odor of these flowers, they attract flies and insects that feed on dead animals. Those insects transfer pollen from the male flowers to the female flowers, which the males outnumber.

But that isn’t the end of this extreme plant design story. Tetrastigma vines have a defense mechanism to prevent the Rafflesia from growing and taking energy from them. They produce chemicals called benzylisoquinoline alkaloids that are related to morphine and codeine. Those chemicals sometimes prevent the Rafflesia from growing in the Tetrastigma vine. However, it doesn’t work all the time. Jeanmaire Molina, a plant biologist at Long Island University, is trying to find out why. She thinks that Rafflesia may have a way to suppress the Tetrastigma’s alkaloid production.

Scientific American magazine quoted Harvard biologist Charles Davis commenting that this research into extreme plant design is essential to understanding the interaction between parasites and hosts. He said that “plants are incredible chemists.” We agree that plants are incredible chemists, but only because the Master Chemist has fine-tuned plants and all of life to survive and thrive on this incredibly well-designed planet. God has given us plants to provide oxygen, food, and a wide range of medical products that enrich our lives.

In a previous post (December 4, 2021), we reported on the titan arum (Amorphophallus titanum), which is known as the “corpse flower.” It also produces the smell of a rotting corpse and attracts flies for pollination. Interestingly, the titan arum uses the same means for pollination, but it is not related to Rafflesia. Evolutionists would call that “convergent evolution,” but we call it evidence of a common Designer.

Reference: Scientific American, March 2022 page 22, and Wikipedia.

February 28, 2022February 27, 2022

King of Saxony Bird-of-Paradise

Saxony is an area of Germany that hasn’t had a king since 1918. However, in the mountain forests of New Guinea, a bird has borne the name King of Saxony since 1894. It’s the King of Saxony bird-of-paradise (Pteridophora alberti).

The males display beautiful black and yellow colors. They also have two blue brow plumes attached to their heads that can be twice the length of the bird’s body. These birds are so strange-looking that when Europeans one for the first time, they thought it was a fake. Native people hunt the male birds for their prized plumes for ceremonial purposes. However, the King of Saxony bird-of-paradise is not easy to catch.

Adult males are highly territorial, guarding their domain while perched high in the tree canopy. Their unique courtship behavior consists of two parts. The first step is sitting on a bare branch and attracting females by singing a hissing rattling sound. It accompanies those noises by waving the long plumes independently or in unison. Next, if a female shows interest, the male will fly down to a lower branch to entice her. Then, the male will bounce up and down in front of the female while giving a hissing call. People find the entire ritual very entertaining.

Regardless of the threats they face from hunting, the King of Saxony bird-of-paradise is not endangered. That is beneficial for the ecology because these birds play a significant role in distributing fruit seeds on the island of New Guinea. Plants and fruits rely on animals to ensure their survival. In return, the plants produce fruit for the animals to eat in this marvelously complex system. Meanwhile, tourists to New Guinea enjoy these birds’ beauty and fascinating behavior.

The King of Saxony bird-of-paradise is a prime example of how each animal is unique, and the Creator has given us many species to study, enjoy, and protect. The interlocking system of birds, other animals, and plants shows evidence of a Creator who is an architect and engineer who has an appreciation of beauty and a sense of humor.

— Roland Earnst © 2022
The Cornel Lab of Ornithology has a video showing the song and dance of these fascinating birds.

February 24, 2022February 23, 2022

Messenger RNA in Plants

Have you ever thought about how plants know where, when, and how to grow? Research funded by the National Science Foundation found that plants have messages packaged into their RNA. They send messenger RNA (mRNA) from cell to cell to coordinate their growth. How do the mRNA molecules know where to go and how to get there? They have an escort to guide them.

This all looks pretty complicated, and it is. The escort for the mRNA is a protein called AtRRP44a. Without this escort to guide the messenger RNA between the cells, the cells can’t coordinate their growth, and the plant can’t develop properly. This cell-to-cell communication allows the plant to have all the information it needs to grow successfully in a changing environment.

Rigid walls surround plant cells, so how can the messenger RNA go from cell to cell? The mRNA, escorted by AtRRP44a proteins, can cross the barriers through tiny holes called plasmodesmata. The plasmodesmata are nanochannels that allow RNA and proteins, hormones, ions, and nutrients to pass from cell to cell.

Dr. David Jackson, who headed up this research at Cold Spring Harbor Laboratory in New York, says, “…plants are very sophisticated. We think of them just sitting in their environment, not moving, but they’re processing a lot of information. The different parts of the plants are talking to each other, sharing whether they have a pathogen attack or if they need some nutrients.”

Have you ever wondered how plants know when to shoot up in the spring, how to not shoot up in the fall, and how to handle infestations by insects and fungus? The creation of plants with this highly sophisticated communication system of messenger RNA and escort proteins is difficult to comprehend.

The more we understand of the creation, the more we see God’s wisdom and sophisticated handiwork. These design features are not accidents but the product of incredible intelligence and creativity.

Reference: National Science Foundation and the journal Science.

February 22, 2022February 21, 2022

Amazing Digestive System Design

The Tufts University Health and Nutrition Letter for March 2022 has a great article titled “Your Amazing Digestive System.” It explains in great detail what happens to food from the time you look at it until it leaves the body. We take for granted what happens when we eat food, but the amazing digestive system is so complex that it is another extraordinary evidence of God’s wisdom and design. Consider the parts of the system as spelled out by the Tuft publication:

THE GASTROINTESTINAL TRACT: This tube runs from the mouth to the anus with a lining separating the food we eat from the inside of our body. Muscles and nerves control the speed of movement of the food, and nutrients are absorbed through the tube wall, which controls what nutrients are absorbed and how fast.

THE MOUTH: The smell and sight of food stimulate the secretion of saliva (which is why our mouths water), moistening and lubricating the food so we can swallow it. The saliva has an enzyme called salivary amylase, which begins to break down starches as the teeth grind the food into more digestible pieces.

THE ESOPHAGUS: This tube is about a foot long and connects the throat to the stomach. It has muscles to push the food along and a valve that opens to let the food enter the stomach.

THE STOMACH: When food enters the stomach, gastric acid and digestive enzymes break down proteins and kill unwanted organisms. Stomach muscles contract and relax, reducing the food to a diluted paste.

THE SMALL INTESTINE: Most nutrients are absorbed here, including proteins, carbohydrates, fats, and micronutrients. This tube is about 20 feet long and an inch in diameter. The small intestine uses enzymes from the pancreas and bile from the gallbladder to break down the food. There are three sections to the small intestine, the duodenum, the jejunum, and the ileum, each absorbing different nutrients.

THE LARGE INTESTINE: Also called the colon, this muscular tube is three times wider than the small intestine but only about five feet long. The colon absorbs beneficial nutrients not previously absorbed. Anything the body can’t use is passed on to the rectum. The large intestine also absorbs water and has a complex organization of bacteria called “gut-microbiota.” Those microbes use fiber to produce beneficial compounds and produce many hormones required for our immune system.

Our amazing digestive system design defies any chance explanation. Each precisely designed part is an essential contributor to our ability to eat and digest food. It is no wonder that so many diseases can negatively affect the digestive system. It is hard to read all we know about this system and not be reminded of Psalms 139:14, “I will praise you, God, for I am fearfully and wonderfully made: marvelous are your works and that my soul knows very well.”

Reference: Tufts Health and Nutrition Letter

February 21, 2022February 20, 2022

Evidence of Life on Mars

The media has sensationalized the finding of organic molecules from Mars. For many people, hearing that something is “organic” means it is related to life. For example, in 1996, scientists reported on their study of a meteorite identified as ALH84001 found twelve years before in Antarctica. Characteristics of the meteorite indicated that it had come from Mars, and analysis showed that it contained organic compounds. Media reports immediately claimed that this was evidence of life on Mars at some time in the past.

Research on ALH84001 reported in January of 2022 shows the organic molecules probably came from the interaction of water and minerals and is not related to living organisms. Two chemical reactions known as serpentinization and carbonation can produce organic molecules when water and minerals react underground. Those reactions occur on Earth, and the researchers concluded that was most likely what formed the organic materials in ALH84001. Earlier researchers had made similar findings on a Martian meteorite named Tissint, which landed in Morocco in 2011.

Neither of these meteorites gives evidence of life on Mars. Organic molecules can form by abiotic (non-life) chemical reactions when water is present, along with the minerals that make up organic materials. Evidence shows that Mars is a place where abiotic chemistry has been very active, creating large amounts of organic compounds but no evidence of any form of life.

God is an incredible chemist. One reason many chemists are active believers in God is that they see the wisdom and creative design built into chemistry, making life possible. There is strong evidence that the laws of chemistry were fine-tuned for life, especially human life.

We may eventually find living things elsewhere in the solar system or other systems. However, finding organic compounds does not give evidence of life on Mars or anywhere else.

References: “Organic molecules in an ancient Mars meteorite formed via geology, not alien life” in Science News (February 12, 2022, page 10) and Science VOL. 375, NO. 6577, January 13, 2022

February 19, 2022February 15, 2022

Why Do Loons Migrate?

It’s a bird that isn’t great at flying and is awkward at walking on land, but it’s very skilled at diving. The common loon (Gavia immer), also known as the great northern diver, is an aquatic bird that somewhat resembles a large duck or small goose. Since flying isn’t their strong point, why do loons migrate?

Most birds have hollow bones to reduce their weight for flying. The fact that a loon’s bones are not hollow adds weight to facilitate diving but makes flying more of a challenge. Loons can dive as deep as 200 feet (60 meters) and stay underwater for three minutes. Because of their dense bones, they sit lower in the water than ducks or geese when they swim. The loons’ legs, located near the rear of their bodies, facilitate quick diving but make walking more difficult.

Loons are well-designed for catching fish and well-suited for life in the ocean, where they spend their flightless winters. When spring comes, the loons molt, shedding their gray feathers and growing black ones. They gain stiff wing feathers and begin exercising to build strength for the migration journey. After a couple of months of preparation, they are ready to fly hundreds of miles north to freshwater lakes, where they spend the summer.

Why should loons leave the oceans where they have an abundant food supply? Just think that they wouldn’t have to go through the changes necessary to fly to the northern lakes. They could also avoid the dangers involved in making the migration. They wouldn’t need the complex navigation methods they use to return to the same lakes where they originated. Why do loons migrate? Why not do what many northerners do when they retire and just enjoy life along the warm and sunny ocean shores?

The answer seems to be more beneficial to other living creatures than to the loons. Their departure from the ocean relieves pressure on fish populations in coastal marine areas. More than that, it helps to control fish populations in northern freshwater lakes. Loons return to the north to benefit the northern ecosystems. These birds are well-designed to fill a niche in the ecosystem that other life forms can’t fully meet.

So even though loons are not the best at flying and even less adapted for walking, they have what is needed to fill a niche in the ecosystem. Why do loons migrate? The loon’s migration may benefit other living creatures more than itself. How could natural selection explain this? According to the survival of the fittest, shouldn’t these birds survive and thrive doing their own thing rather than benefiting others? We don’t think natural selection fully explains the design of loons and their lifestyle. We suggest that the common loon is a testimony to the Creator’s wisdom of design in the life system we see all around us.