Astronauts inhale oxygen and exhale carbon dioxide, just like you and me. On Earth, where exhaled air warmed by our bodies naturally rises away from us, the possibility of inhaling too much carbon...
Imagine the surprise of the first cave person who ever glanced into a reflecting pond.聽The image probably wasn't too pleasing but the effect was surely intriguing.聽Vanity was instantly born and the...
It must have been quite a scene.聽 The little man, no more than five foot four, dressed completely in white, center stage, playing pitch and catch with a chimp.聽 But there was no ball in sight.聽 Dr....
I once broke my tooth on some toffee my mom made. Every time I see a beaver, I think of that day and wonder how they can gnaw on trees all day without chipping an incisor when I couldn鈥檛 even...
鈥淒og Rocks鈥� are supposed to solve the problem of grass dying from dog pee. Urine contains a variety of nitrogen compounds, mostly metabolites of protein in food. These are effective fertilizers,...
