Polaris Dawn crew conducts first all-civilian spacewalk
The spacewalkers tested new SpaceX-designed pressure suits that could eventually be used by civilian astronauts on the moon and Mars.
Transistor issue resolved, NASA clears way for Europa Clipper launch
The Europa Clipper remains on track for launch Oct. 10 to study Jupiter’s icy moon Europa, where a vast ocean lurks beneath an icy crust.
Missouri patient contracts bird flu despite no known contact with animals
The case raises questions about how the person was exposed to the virus. All the previous U.S. infections were among people who worked around cows and poultry.
Researchers find evidence that large sharks may be hunting each other
Researchers discovered the first known case of a porbeagle shark likely being killed by a large shark predator, raising questions about whether this rare instance represents a larger trend.