Orphaned baby walrus in Alaska flown 4,800 miles to new home in Florida

A young, orphaned Pacific walrus found on a remote beach in northern Alaska has been rescued and brought more than 4,000 miles to Florida, where it's receiving care at SeaWorld Orlando.

Ancient DNA challenges theories about when humans first reached North America

Researchers examining ancient DNA have narrowed down the timeline of early human migration into North America — shedding light on a question that's puzzled scientists for decades.

Astronomers discover 1st green star in space as white dwarfs break color rules

Astronomers found that white dwarf stars can display surprising colors because of their dense, chemically diverse atmospheres, including the first known genuinely green star.

Invasive hairy ants are on the move: What to watch for

Invasive, hairy ants are spreading across the Southeast U.S., creating “super colonies” with millions of critters and costing millions of dollars in damages along the way. 

Inside NASA's plan to explore underground lunar caves that one day could shelter astronauts

NASA is preparing to explore deep craters on the moon, known as the Marius Hills pit, to determine if ancient underground caves could provide shelter for future astronauts.

SpaceX launch creates 'jellyfish' sky glow across DMV early Tuesday

The "jellyfish" glow of a pre-sunrise SpaceX launch could be seen in the sky across the Washington, D.C. region on Tuesday.

Man dies after entering tiger enclosure at wildlife park

A man died Saturday after entering a tiger enclosure at Yorkshire Wildlife Park and being attacked, authorities said.

Margaret Hamilton, pioneering Apollo program software engineer, dies at 90

Margaret Hamilton, the pioneering computer software engineer who led the development of on-board flight software for NASA’s Apollo moon missions, has died at age 90. 

NASA’s Curiosity shares dramatic glimpse of Martian dawn

The Curiosity rover snapped what NASA scientists are calling the most detailed view yet of the distant, wind-carved Martian cliffs at dawn, and leaving them asking more questions about what they see. 

Study finds higher levels of everyday chemicals in baby teeth of kids with autism

A pilot study from The University of Texas at San Antonio Health Science Center found higher levels of several potentially harmful chemicals in the primary teeth of children with autism compared with children without autism.

NASA's SpaceX Crew 12 to undock from ISS, splashdown off coast of California

Now that NASA's Crew 13 astronauts are safely aboard the International Space Station, Crew 12 is preparing to undock and begin its journey back to Earth.

Scientists discover 57 new marine species lurking in the depths of the South Atlantic

A group of scientists in Argentina discovered dozens of new species in the South Atlantic Ocean, shedding new light on one of the world’s most biologically dynamic regions.