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Interesting Engineering9h
100 years on, ESA tests Einstein’s relativity theory with atomic clocks on ISS
ACES will gather ultra-precise data across at least ten observation windows, each lasting about 25 days during the ...
Space.com12h
Don Pettit, NASA's oldest active astronaut at 70, arrives in Houston after 7-month space mission (photo)
Don Pettit arrived in Space City on Sunday (April 20), which happened to be his 70th birthday.