Biology’s four-letter DNA alphabet just expanded to eight

Archaeologists Just Found the Most Complete Denisovan Record Yet—and It Goes Back 190,000 Years

Archaeologists in China have uncovered the most complete record of Denisovans to date, including the first discovered arm bone and tools from 190,000 years ago.

NASA Found Strange Holes on Mars. Scientists Aren't Sure What Made Them.

NASA's Curiosity rover celebrates 5,000 Martian days on Mars amid the discovery of mysterious holes of unknown origin.

Astronaut’s Before-and-After Photos Show How Cities Switched From Orange to White Light

Astronaut photographs captured 12 years apart reveal a dramatic global shift in city lighting from orange glows to bright white LED illumination.

"We've Never Seen Anything Quite Like This": A Strange Ten-Sided “Structure” Has Been Spotted on Saturn's North Pole

Northern Lights Could Be Visible From These Nine States Tonight

China on track to launch Mars sample-return mission in 2028: 'If accurate, this represents a Sputnik moment'

China moves to launch a Mars sample-return mission in 2028, prompting comparisons to a Sputnik moment from a former NASA expert.