Life's Little Mysteries: Science questions, answered

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

Whether Neanderthals had religious beliefs is a subject of ongoing debate.

Free radicals are highly reactive molecules that are missing an electron. They get a bad rap, but could they actually have any benefits?

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

Rome is famous for its gladiators, but were any of these fighters women?

Space looks very dark from Earth. But does the solar system, and the universe for that matter, have an area that's the darkest of all?

London is at the same latitude as Calgary, Alberta. So why is the Canadian city about 15 degrees Fahrenheit (8.3 degrees Celsius) cooler in January?

Even without brains, creatures like jellyfish and sea anemones can learn from experience.

Bubbles are usually the first sign that water’s coming to the boil, but heating it in a microwave seems to skip this important step. Here’s what’s going on.

It's not just humans who notice optical illusions; certain animals do too, and they often use it to their advantage.