Since Yuri Gagarin achieved the first manned space flight in April 1961, humans have been fascinated by space travel. The world watched as Neil Armstrong walked

Since Yuri Gagarin achieved the first manned space flight in April 1961, humans have been fascinated by space travel. The world watched as Neil Armstrong walked

Since Yuri Gagarin achieved the first manned space flight in April 1961, humans have been fascinated by space travel. The world watched as&nbsp;Neil Armstrong&nbsp;walked

Share Could humans hibernate during travel to Mars?: Mayo Clinic Radio

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Could humans hibernate during travel to Mars?: Mayo Clinic Radio

Could humans hibernate during travel to Mars?: Mayo Clinic Radio