NASA plans to send a 400,000 kg manned spacecraft on a 30-month round trip to Mars as early as February, 2031. Cost estimates range from $20 billion to $450 billion; the mission would be the most complex technical feat ever attempted. Should humans go to Mars?
Do you crave the companionship of a pet, but can't be dogged by the commitment? New research suggests that robotic dogs can give you some of the same benefits you'd get from the real thing, as this video explains.
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