Odds of "city-killer" asteroid hitting Earth in 2032 go up again, NASA says
Vaccine targeting pancreatic cancer shows promise in new study
Egypt announces discovery of the lost tomb of King Thutmose II
Key facts about asteroid that could hit Earth in 2032
NASA rover captures images of "mother-of-pearl" clouds on Mars
NASA announces plan to bring Starliner crew home next month
Mexican long-nosed bats now being tracked via "eDNA" using their saliva
U.K. firm finds way to turn damaging greenhouse gas into useful products
