What we Know about Moon: The moon plays a role in your life you’re not appreciating enough. Learn more about it in this infographic.
Saturn aurora, taken by Nasa Hubble.
stones and their uses
Sunrise at the North Pole when the Sun and the moon are at their closest point
Supercell in Piedmont OK by the urban fabric, via Flickr
A storm system over Vega, Texas, US.
Roll cloud. A roll cloud off the coast of Punta del Este, Uruguay.