With so indescribably many stars and planets in existence, certainly we aren't alone in the universe! Or are we? Strangely, we haven't discovered any hints of life beyond Earth. The contradiction, known as the Fermi paradox, is...

What are the odds of finding intelligent life somewhere else in the universe? The Drake equation can help us estimate the answer. Advanced astronomers find that perhaps the biggest determining factor is longevity of civilizations. There...