Ah, the sun. I love that big, bright ball in the sky. But as it turns out, it is only half the reason we’re toasty warm here on Earth. The other half of our heat comes from nuclear fusion deep inside the planet. This according to Scientific American. Read the whole article here. Then, get back to sun tanning or whatever it is you humans do without a body covered in hair. As a kangaroo, I love not needing any sunscreen.