48,000-Year-Old Fossils Hint at Neanderthal-Human Interbreeding

A pair of spacewalking astronauts completed a four-year effort to modernize the ISS's power grid. The space station is now equipped with 24 lithium-ion batteries to store power collected by the solar panels. NASA expects these batteries to last the rest of the space station's operating life.

357,000-Year-Old Abrading Tool Unearthed in Israel

Stunningly Preserved 220-Million-Year-Old Dinosaur Footprint Discovered by 4-Year-Old