Saturn is about 95 times more massive than Earth, but it's made mostly of hydrogen and helium. Its average density is roughly 0.7 grams per cubic centimeter, less than water. It's the only planet in our solar system like that, so in theory it would float. You'd just need a bathtub more than 120,000 kilometers wide.
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.