Colonel Chris Hadfield is a Canadian Astronaut currently living in space aboard the International Space Station. He has a Tumblr account and regularly posts images he takes out the window of the ISS. Just wow. His Tumblr is a great reason, all by itself, to get an account.

Here are a few examples:

Boston at night, glowing under a trace of fog:

Venezuelan valley framed by misty clouds - mysterious, beautiful, and surreal:

Full Moon rising. So near, and yet...

Click the images to see Colonel Chris Hadfield's Tubmlr blog.

This new xkcd series is frakkin' awesome, updated each Thursday. It's speculative-nonfiction humor writing, leaning heavily toward the Hard SF end of the spectrum.

First up: "What would happen if you tried to hit a baseball pitched at 90% the speed of light?" Here's a hint:

Click the image to see the first installment of xkcd's "What if?"

Things don't get better from there. Or they get AWESOME, if you're a physics nerd.


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