Life's Little Mysteries

How do scientists know when an earthquake is expected to hit an area?

It's a trick question.

Unlike chocolate chip cookies or tomato soup, the invention of bread can't be pinned down to a single person or people; instead, it evolved to its present state over the course of millennia.

Hint: It holds 3.3 trillion stars.

Only a certain type of uranium works in nuclear reactors and bombs. Separating that type from the more common kind requires a great deal of engineering skill.

Can cats, dogs or other animals predict earthquakes?

That microwave popcorn smell has a history. And while some people love it, others say it smells like vomit or urine.

So refreshing. But is it hydrating?

It's a crucial component of the human body.

Over time, a person's poop can really add up.

Metabolism refers to the calories the body uses at rest.

Some would argue that there are no winners in warfare. But in some battles, the losses are more embarrassing than others.

Here's the horrifying story behind the former president's dentures.

Moon-based detritus includes leftover urine-collection kits, an olive branch and tons of robotic equipment from lunar probes.

When you come down with a cold, the last thing you probably need is, well, another cold.

During the so-called Super Blue Blood Moon lunar eclipse, the face of the moon will turn a brick-red hue. Here's why.

The short answer is no, but they do have a stylet. Here's how that works.

Turns out a little disgust is good for you.

Do you drink eight eight-ounce glasses of water a day? That's nice — but you really don't need to.