Richard Feynman (via willou901)
Crazy Hills of San Francisco
Håkan Dahlström got this delightful shot of one of San Francisco’s steeper hills, turning his camera so that the road (and not the houses) were at level to convey the extent of the slope.
Have you ever thought about the art of sound? Here is a video of what happens when sand is sprinkled on top of a table that resonates with the changing frequencies of sound. The patterns are eerily uniform. What kind of pattern would a frequency that humans can’t perceive produce?