In the Sun's core, about 600 million tonnes of hydrogen fuse into helium every second. The helium weighs slightly less, and the missing 4 million tonnes or so turns into energy, exactly as E = mc² predicts. Don't worry: even at that rate, it has billions of years of fuel left.
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.