Here is the science behind 13 Halloween horrors come to life.
The discovery of nearly 90 shark teeth, largely from young sharks, indicates there was a shark nursery here 24 million years ago.
A Tyrannosaurus rex called Stan ended up on the auction block because of a lawsuit. Here's how it happened.
A seven-armed octopus unexpectedly washed ashore on Whidbey Island, Washington, even though these cephalopods aren't native to the area.
About 100 million years ago, a gigantic meteorite collided with Australia, creating a 3-mile-wide impact crater.
A CT scan of an ancient mummy shows that its "mummy portrait" was almost, but not completely accurate.