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Extinct cetaceans are more like sea monsters, and can make nightmares seem dull. See these 10 extinct cetaceans to explore the ancient world.

Trovants, found only in a small town in Romania, are stones that actually seem to move and grow. But are they alive?

Do rhinoceros double as firefighters? That's the legend, at least. But is there any truth to it?

One of the largest crocodiles ever was so big that one website called the species "bus-sized."

Piranhas are some of the most feared fish in the world, but is their reputation for ferocity a bit overblown?

Ever wondered where lemonade comes from? HowStuffWorks looks at the history of this popular, puckery thirst quencher.

How did dinosaurs leave tracks in solid stone? They walked in soil that became sedimentary rock. Learn how did dinosaurs leave tracks in solid stone?

Just how big do animals come? Find out as we dive backward through history to unearth the largest land animal of all time.

It covers more than 30 percent of the planet, and is home to all kinds of sea creatures. What other facts make the Pacific Ocean so amazing?

Not all fossils are found on dry land. In fact some of the most fascinating fossil finds in history have been submerged for centuries.

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