Marilyn Perkins

Normally, siblings resemble each other. So why does a litter of kittens often come in a variety of colors?

While it might seem like an all-or-nothing process, insect metamorphosis likely emerged through gradual evolutionary changes.

Teeth and bones may appear alike, but they actually have more differences than similarities.

There's some truth to the urban legend that certain toads have psychedelic properties, but licking them isn't a good idea.

When someone's heart stops beating, their brain cells start dying within minutes. But sometimes, they can still come back from the dead.

Does every fig you eat really have a dead wasp inside?

Ranking who has the best ears in the animal kingdom is a tough task, but some animals push the limits of hearing far beyond what humans can imagine.

People report vivid dreams during rapid-eye-movement sleep. But is this sleep stage really the only time we dream?

It's a well-known fact that most cats despise getting wet. But why?

Cat owners have noticed their pets seem to go crazy for concrete blocks. Why?

About 1 in 12 men is color-blind. Why doesn't this condition affect women as often?

Mars is smaller than Earth, but does it have any moons?

Everyone knows what a happy cat sounds like. But are they the only animals that purr?

Whole-body MRI scans have risen to prominence for their alleged ability to catch many health conditions early. But are they legit?

When it comes to exceptional eyesight, picking a clear winner is harder than you might think.

To navigate the skies, birds rely on a complex sensory tool kit.

Scientists are still debating whether the human brain is capable of growing new cells past childhood.