Enceladus, barely 500 km across, shoots geysers of water vapour and ice grains from a hidden ocean out of its south pole. These jets even feed one of Saturn's rings. The Cassini spacecraft flew through the plumes, and the ejected grains turned out to contain salt, organic molecules and phosphorus.
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.