@littlek,
I recently discovered the
Wired Science blog. It's an amazing connection of science-related photo galleries, mostly space stuff. In addition, most of the photos come paired with some fascinating scientific issue, which they illuminate. For example, here is a photo from the latest entry, discussing dunes on Mars:
In this case, the bonus scientific question is this: In the thin atmosphere on Mars, winds almost never blow hard enough for dunes to form in the way it happens on Earth. So how
do they form? Anyone interested can learn more in this article:
Martian Dune Mystery Solved by Bouncing Sand Grains
Love it!