Your skin needs exposure to ultraviolet-B rays in order to synthesize vitamin D. Unfortunately, this is the same ultraviolet-B that causes sunburn and skin damage.
Perhaps I’m missing something, but the following strikes me as a profoundly stupid question: “Why do women long outlive their fertility?”
Which came first, the chicken or the egg?
This scientific paper is a triumph of form over content.
I was pleased to read on the Cali Bamboo site that the problem of global warming has been solved.
A couple of years ago, I wrote about a report that rats laugh ultrasonically when tickled.
Here’s an interesting math quiz. It’s short (only eight questions), but you have to solve them mentally: no pencil or paper, except to record your answers.
Large numbers are hard to comprehend. It helps to visualize them in terms of a familiar, everyday object, like a U.S. penny.
The big periodic table chart on the wall of your high school chemistry classroom was useful, but it wasn’t very pretty or interesting, was it?
The lunatics at Case are not the only people who’ve been playing with large quantities of Silly Putty.