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Since its formation nearly five billion years ago, our planet has been the sole living world in a vast and silent universe. Now Earth's isolation is coming to an end. Over the past two decades, astronomers have discovered thousands of 'exoplanets' orbiting other stars, including some that could be similar to our own world. Studying those distant planets for signs of life will be crucial to understanding life's intricate mysteries right here on Earth....
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There are tons of movies about aliens coming to Earth. Sometimes they come to be our friends, sometimes they come to destroy us-and sometimes they come to make circles in our cornfields. But what about reality? Do scientists actually believe there is intelligent life somewhere out in space? In fact, many scientists spend their days looking for signs of life throughout the galaxy. Others look for ways to make contact with aliens if they exist. And...