In the movies, humans often fear invaders from Mars. These days, scientists are more concerned about invaders to Mars, in the form of micro-organisms from Earth.
A newfound asteroid safely passed Earth on June 8 from a distance of about 777,000 miles (1.25 million kilometers), more than three times farther away than our moon.
It’s not just Lois Lerner’s e-mails.
Pivoting planets that lean one way and then change orientation within a short geological time period might be surprisingly habitable
Of the many lessons to be learned from Edward Snowden, one of them is that the congressional intelligence oversight process did not function properly.
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