In 1949, during a radio broadcast, astronomer Fred Hoyle used the words 'big bang' for the idea of a Universe born from a hot, dense beginning. Hoyle championed a rival theory of an eternal, unchanging Universe. He always denied meaning it as mockery, but the phrase took off, far more than his own theory did.
A large share of Earth's water molecules formed in the interstellar cloud that existed before the Sun was even born, more than 4.6 billion years ago. You are literally drinking a cosmic fossil.
By day, the Martian sky looks butterscotch because of fine dust hanging in the air. But at dusk, those same grains scatter blue light forward, creating a bluish glow around the Sun. Rovers have photographed these blue sunsets: the exact reverse of what we see on Earth.