Life's Little Mysteries

Istanbul has had many names, including Byzantium, New Rome and Constantinople. It didn't officially become Istanbul until 1930.

As men age, their testosterone levels stay high until age 70 or so, prompting their eyebrows — and ear and nose hair, too — to grow longer and longer.

In the fourth century B.C., a little-known Greek mariner visited the British Isles. When he returned, he wrote a book about his travels, called "On the Ocean," which was read for centuries.

The asteroid that crashed into Earth 66 million years ago unleashed a catastrophic series of events.

Our flavor preferences remain malleable throughout our lives, but especially in childhood.

So long as you're travelling to Rome.

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

It's often assumed that birds are the only animals that sing. But these other divas of the animal kingdom prove otherwise.

Here's how some people can squirt liquids or smoke from their eyes.

Here's why back pain is so universal among our species.

Is there any truth to the saying that 'cats rule, dogs drool'?

Some big cats can roar loudly, but house cats can only meow and purr. Why is that?

Humans are getting better at staving off death our technological and medical advances. But could humans ever become immortal?

Radiation is all around us, but how does it get into our bodies?

Here are the largest predators ever to have lived in North America.

Snakes have evolved highly adapted fangs that act as a delivery system for toxins.

Here's a look at the research about whether left-handed people are smarter than righties.

About 4.5 billion years ago, the solar system was just a giant, spinning cloud of gas and dust. Today, it's flat. Here's how that happened.