By comparing data from the 1st-ever Pluto flyby and a 1st-ever comet rendezvous mission, scientists have developed what they call ‘the giant comet’ model of Pluto formation.
On May 25, 1961, President John F. Kennedy gave a stirring speech to a joint session of Congress, inspiring a nation to land humans on the moon within a decade.
Astronauts aboard the International Space Station captured these images of Mount Shasta while orbiting over northern California at different times of the year.
'What we are witnessing is major hydrologic change,' they said. Over 14 years, Earth's wet land areas got wetter. Dry areas got drier. They also reported multiple hot spots resulting from groundwater depletion.
An astronaut aboard the International Space Station snapped this photo of California's Mount Shasta poking out of the fog-filled valleys of the Klamath Mountains. Mount Shasta is an active volcano that has erupted at least once per 800 years for the past 10,000 years.
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