There are street artists. Street musicians. Street actors. But there are no street physicists. A little known secret is that a physicist is one of the most employable people in the marketplace - a physicist is a trained problem solver.

With no gravitational force to work against, your body not only doesn't need the same amount of muscle and bone, it starts breaking them down. As on Earth, so in space: use it or lose it. And exercise may not solve the problem.

Some air you inhale was exhaled by Cleopatra.

Science is basically an inoculation against charlatans.

When I would lose matches, I fully respected the person who beat me, because they beat me. I can't blame anybody.

I have yet to see a successful prediction about the physical world that was inferred or extrapolated from the content of any religions document.

There is no true understanding of Biology without Chemistry. And there's no true understanding of Chemistry without Physics.