Science fiction has imagined everything from little green men to tentacled monsters—but real biology may offer clearer clues. Evolution follows universal rules, meaning alien life on Earth-like ...

If you've been following exoplanet research over the last couple of years, you've definitely heard of K2-18b. Located 124 ...

Avatar, Westworld, Interstellar, 2001: A Space Odyssey, and more make up our list of the most ambitious sci-fi masterpieces ...

After more than a year of his chaotic second term, President Donald Trump got a prime time chance to convince Americans the state of the union is strong. CNN annotated Trump’s speech with context and ...