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The Physics of How Bikes Stay Upright

We still don’t really know how bicycles work… The first bicycles were invented, not through any kind of scientific procedure, but by dumb old trial and error. Even modern bike design schools admit that it’s not engineering...

Is there a center of the universe?

It’s been a long road to the discovery that Earth is not the center of the Solar System, the Milky Way, or the universe; great thinkers from Aristotle to Bruno have grappled with it for millennia. But if we aren’t at the center of the universe, what is? Marjee Chmiel and Trevor Owens discuss where we stand in the (very) big scheme of things.

A Self-portrait

Photograph by NASA   International Space Station astronaut, Aki Hoshide (Japan), recorded this striking image while helping to augment the capabilities of the Earth-orbiting International Space Station (ISS). Visible in this outworldly assemblage is the...