Once the hydrogen in its core runs out, the Sun will swell into a red giant, up to about 200 times its current size. Mercury and Venus will be engulfed; Earth's fate is still debated, but it will be scorched either way. The Sun will end as a white dwarf, barely bigger than Earth, slowly cooling for eons.
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.