Donavyn Coffey

Many people give up meat for ethical, health or environmental reasons. But is it OK to put a cat or a dog on a vegetarian or vegan diet?

Here are the top four (and a bonus fifth) elements that make up the human body.

What does it take for an asteroid to make a dent on Earth, and which known impact events have left the biggest craters?

Is COVID-19's rapid evolution unusual, or do other viruses have as many variants as this coronavirus?

Here's why you may start tearing up while slicing an onion.

Do scientists know if Earth is shrinking or expanding, and if this difference over time will threaten life on our planet?

Researchers have several ideas as to why people sometimes stick out their tongues when they're concentrating.

Fetuses don't breathe oxygen in utero, so how do newly born babies figure it out?

The cheetah is often called the world's fastest animal. But is that true?

How does DNA know when to become active?

Does everyone have a monologue in their head?

Even if they don't get moldy, nuts and grains can go bad. Why is that?

Brazil nuts and cashews are crunchy and small, so why aren't they nuts?

Can we harness natural and human-made carbon traps to help us slow climate change?

What took out the trilobites, whose fossils are found all over the world?

Some galaxies are swirling blue disks, others are red spheres or misshapen, clumpy messes or something in between. Why the different configurations?

The Sahara was once a grass and shrub-covered steppe. Could this ever happen again?

The nothingness of space is hard to wrap our heads around.

Have you ever wondered why humans can't digest corn?

There are three main types of UV light, but only one can kill SARS-CoV-2.

It depends on whether the planet's atmosphere is predominantly filled with gas or dust particles.

Activated charcoal can protect against some poisons, but can it help whiten your smile?

People may falsely confess to a crime for any number of reasons, but it disproportionally happens to those who are young or disabled.

What would happen if our Earth were much larger than it is now?