Mindy Weisberger

A boy stumbled upon a mastodon molar while on a nature walk in Michigan.

New analysis of bones in the Tomb of Nestor's Cup revealed a surprising discovery: Long thought to be the burial of a child, the tomb instead held the remains of at least three adults.

Conversational video technology enables AI-powered back-and-forth between viewers and prerecorded responses.

Thawing permafrost driven by climate change could free decades-old radioactive material, antibiotic-resistant microbes and unknown viruses that have been frozen for millennia.

In the Umm Jirsan lava tube, the longest such structure in Saudi Arabia, scientists discovered piles bones belonging to animals that hyenas devoured there for thousands of years.

Unusually hot and dry conditions fueled a dust cloud and birthed a rare sandstorm of massive proportions.

A whale that was found belly-up on a New York beach likely died of injuries caused by interactions with people.

Using genetic data, a forensic artist rebuilt the faces of three ancient Egyptian mummies, revealing each individual's likely appearance as a 25-year-old.

One of the Southern Resident orcas, a 47-year-old female known as L47, hasn't been seen by census takers since February.

Maya people who had fled their cities after a volcano erupted returned and built an enormous pyramid from the volcanic debris.

The short film "Life Beneath the Ice" features delicate, illuminated marine creatures living under the sea ice in Antarctica.

A farmer in Russia's Stavropol region found the waterlogged "king." Specimens of rat kings are preserved in the collections of some natural history museums.

Over 100,000 years ago, extinct relatives of modern elephants lived in matriarchal groups, according to preserved trackways in southwestern Spain.

A newly described extinct giant penguin from New Zealand has unusually long legs and a long, slender beak, and it dates to a time when much of the region was underwater.

For millennia, the function and importance of this singular organ has fascinated physicians, philosophers and artists around the world.

In a new analysis, researchers compared hundreds of such cases across primate species.

Our quest to understand how the heart works — in ourselves and in other animals — has inspired philosophers and artists as well as doctors and researchers.

Outstanding examples of stunning microscopy were recently honored in the Nikon Small World contest.

These ghastly meals provide male butterflies with chemicals that they use to produce mating pheromones, which female butterflies find irresistible.

A newly described species of mosasaur, an extinct marine reptile, swam through Cretaceous seas 80 million years ago and had a slender snout like a crocodile's.

Thylacines, once widespread in Australia, have been extinct for nearly a century, but newly colorized footage provides a glimpse of what they looked like in life.

An ocean creature that lived around 500 million years ago was the largest predator on the sea bottom.

Of all the colors we can see in nature, blue is one of the rarest.

The largest triceratops in the world, scheduled to be auctioned on Oct. 21, will be on display to the public in Paris beginning Sept. 16.