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What we know about gunman Thomas Matthew Crooks who shot at Trump at his Pennsylvania rally
The Independent via Yahoo News· 19 minutes agoSuspected shooter, 20, was Pennsylvania resident and a registered Republican although he had donated...
Why do astronomers look for signs of life on other planets based on what life is like on Earth?
The Conversation via Yahoo News· 47 minutes agoThe Viking lander experiments were the most direct tests for life on other planets. In terms of a...