Jenny McGrathChris Panella

The Russell-Einstein manifesto warned nuclear weapons could end humanity. The physicist felt remorse over his role in the atomic bomb.

Neanderthals' extinction is one of the biggest mysteries about the species. In "The Naked Neanderthal," Ludovic Slimak says humans were the cause.

Mary Shelley was likely well aware of some gruesome experiments involving electricity that occurred a few years before she wrote "Frankenstein."

A 13-year-old saw a skull protruding from a boulder. The fossil belonged to an ancient toothless walrus, Valenictus sheperdi, now named for him.

Euglenoids are microscopic organisms with both animal and plant traits. A YouTube video gave researchers the key piece to their evolutionary history.

A shrinking lunar crust causes moonquakes and could lead to dangerous landslides that may harm future NASA astronauts who land on the moon.

For over 170 years, a 4,000-year-old tomb in Ireland was believed to be lost. A researcher recognized the large stones based on a 185-year-old sketch.