The Amazon tycoon has big plans for space. He envisions a future in which a "trillion" (yes, a trillion!) people live in giant, rotating spaceships like that one from the movie 'Passengers." There are some scientific problems with his argument. Let's take a look.
Being an astronaut is a hazardous job. Not only are they exposed to higher levels of radiation and the fury of Earth's atmosphere upon re-entry, they must also handle a nearly 2° F increase in core body temperature.
At age 86, living legend Dr. Buzz Aldrin was recently medically evacuated from the South Pole. In the first of a two-part series, Dr. Jamie Wells shares an experience she had at high elevation with the former astronaut when addressing altitude illnesses, prevention and treatment.