This event happens only once in a blue moon.

Four Iron Age people buried with ample weapons may have died of an infection 2,500 years ago.

After the dog's burial, rising sea levels flooded the region.

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.

Earth will change the direction of an asteroid that's getting awfully close this week.

Going forward, the North Pole will be plunged into twilight and then darkness.

A CT scan of an ancient mummy shows that its "mummy portrait" was almost, but not completely accurate.

An ancient cave bear adult and cub mummy have been found in the melting permafrost of Siberia.

This dinosaur was likely resting in a burrow before it was abruptly buried alive.

This is "one of the most complete" skulls of a titanosaur dinosaur from Patagonia.

Archaeologists have yet to open any of the 2,500-year-old coffins.

It's possible the Vikings thought the afterlife was a mirrored version of the real world.

The fortress was built to stop the Philistines, who wanted more land.

Usually September's full moon is closest to the autumn equinox. But this year, it isn't.

Here's the science behind 20 animal tongues.

This type of caiman could grow to up to 33 feet in length.

All that protected this jar of gold was a nail and a good hiding spot.

Before it died in what is now Siberia, this ice age puppy ate a chunk of woolly rhino meat.

An ichthyosaur devoured a thalattosaur about 240 million years ago.

Several clues indicate that a field near Tel Aviv is the site of the 1191 battle.

The section of the refuge poised to be leased is a key habitat for Arctic wildlife.

In 7000 B.C., a kiln-like pit became the site of the earliest know human cremation in the Near East.

It's unclear what killed this roughly 15-year-old male woolly mammoth at least 10,000 years ago.