Earth is covered in water—but scientists still debate how it got here in the first place. This video explores the mysterious ...
A gigantic explosion of a star halfway across the universe long ago aimed a burst of gamma rays directly at earth, says an international team of scientists. According to the astronomers, the gamma ray ...
A recently exploded star relatively near the solar system is raining radioactive metal down on earth, according to a new study published Thursday. Specifically, researchers found the radioactive ...
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