Although China uses the Gregorian calendar (meaning it's the year 2020 there, just like in the U.S.), its holidays are governed by the traditional lunisolar calendar, according to National Geographic.

Three robotic systems funded by NASA are converging on a single goal: proving that machines can scout, dig, and communicate ...

History recalls the names of Borman, Lovell, and Anders; of Apollo 11’s Neil Armstrong, Michael Collins, and Buzz Aldrin; of Apollo 13’s Lovell, Jack Swigert, and Fred Haise. It may soon recall, as ...