Prehistoric sea cow was eaten by a croc and a shark, newly discovered fossil reveals
NASA’s Perseverance rover has embarked on an ambitious road trip on Mars
Astronaut John McFall carries Paralympic flag at opening ceremony Aug. 28
FAA requires investigation into SpaceX Falcon 9 landing failure
FAA grounds SpaceX after rocket falls over in flames at landing
SpaceX rocket grounded as two key human spaceflight missions loom
Wasn't polio wiped out? Why it is still a problem in some countries
FAA grounds SpaceX Falcon 9 rockets after rare crash-landing
