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Adding two identical waves, shifted by different amounts, to give a new wave. The waves interfere to either amplify each other, cancel each other out, or something in between. [more] [code]

Having been lucky enough to travel on numerous roads like this last summer, I'm pretty sure I remember being genuinely and irrationally afraid of this exact thing happening. I have no clue why.

Milford Sound by Tim Jordan Photography on Flickr.

P-61 Black Widow cockpit.

From the coldest cold to the hottest hot, here’s all the universe’s temperatures.

(from BBC Future)

Bonus question: What is hotter, a boiling tea kettle or an iceberg?

El Paisaje Dual Iceland Miguel Ángel García

If people do not believe that mathematics is simple, it is only because they do not realize how complicated life is.

(via brittbutterfly21)