Are There Civilizations Older Than Our Galaxy?
We often look up at the night sky and see a vast, dark blanket dotted with tiny, twinkling lights. Each of those lights is a star, and many of them…
How Many Civilizations Could Exist in the Milky Way?
Our galaxy, the Milky Way, is a vast and beautiful collection of stars, gas, and dust. On a clear, dark night, you can see a faint, milky band of light…