Those watching the footage of the Tavurvur volcano probably noticed appearing and disappearing clouds along the edge of the shock wave. They're called Wilson clouds, and they used to flicker in the sky above nuclear bombs, too.
Check out this fantastic footage of Papua New Guinea's Mount Tavurvur ejecting untold heaps of lava, rock, and ash hundreds of meters into the air. Between the striking burst of clouds above the volcano and the jarring boom of the delayed shockwave, this is one of the most dramatic eruption videos we've ever seen.
What does a culture look like when recreation is forbidden? The Baining, an indigenous group in Papua New Guinea, values work as the highest human ideal, and views play as domain of animals. This has led some anthropologists to deem them "unstudiable" because of their failure to do anything interesting. But a…
Imagine a number line in your head. Got it? Now think about this: how did it get there in the first place; is the ability to map a number line in your mind an innate human ability, or is it a concept that must be learned?