So far, scientists have one place to study the life forms in the universe: Earth. However, across our planet, life is anything but homogenous. From the watery, dark depths of the ocean to frigid ...
When is it OK to kill an alien life-form? In the movies, the answer is usually pretty simple: It’s OK in self-defense, especially if it inspires a rousing speech about human exceptionalism. But in the ...
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