What happens when a baby takes its first breath? By Donavyn Coffey Fetuses don't breathe oxygen in utero, so how do newly born babies figure it out?
Why is alcohol used to preserve things? By Donavyn Coffey Here's how alcohol can help preserve DNA, tissue samples and even entire organisms.
What is the fastest animal on Earth? By Donavyn Coffey The cheetah is often called the world's fastest animal. But is that true?
How does DNA know which job to do in each cell? By Donavyn Coffey How does DNA know when to become active?
Does everyone have an inner monologue? By Donavyn Coffey Does everyone have a monologue in their head?
Why do nuts and grains go bad? By Donavyn Coffey Even if they don't get moldy, nuts and grains can go bad. Why is that?
Why does Christianity have so many denominations? By Donavyn Coffey Schisms within the church have led to more and more denominations over the millennia.
Why aren't peanuts, pecans and almonds real nuts? By Donavyn Coffey Brazil nuts and cashews are crunchy and small, so why aren't they nuts?
Could we ever pull enough carbon out of the atmosphere to stop climate change? By Donavyn Coffey Can we harness natural and human-made carbon traps to help us slow climate change?
Why did trilobites go extinct? By Donavyn Coffey What took out the trilobites, whose fossils are found all over the world?
Why are galaxies different shapes? By Donavyn Coffey Some galaxies are swirling blue disks, others are red spheres or misshapen, clumpy messes or something in between. Why the different configurations?
Could the Sahara ever be green again? By Donavyn Coffey The Sahara was once a grass and shrub-covered steppe. Could this ever happen again?
Does UV light kill the new coronavirus? By Donavyn Coffey There are three main types of UV light, but only one can kill SARS-CoV-2.
What color is the sunset on other planets? By Donavyn Coffey It depends on whether the planet's atmosphere is predominantly filled with gas or dust particles.
Does charcoal toothpaste really whiten teeth? By Donavyn Coffey Activated charcoal can protect against some poisons, but can it help whiten your smile?
Why do people confess to crimes they didn't commit? By Donavyn Coffey People may falsely confess to a crime for any number of reasons, but it disproportionally happens to those who are young or disabled.
What if Earth were a super-Earth? By Donavyn Coffey What would happen if our Earth were much larger than it is now?
What Is Coral Bleaching? By Donavyn Coffey Nature's red flag is the eerie white glow of one of the ocean's most biologically rich ecosystems.
How Do Wildfires Start? By Donavyn Coffey More than 8.5 million acres of land in the U.S. burned this year. Here's how the raging flames get their start.
