Something weird is going on with human sperm production. For decades, scientists have warned that sperm counts are dropping among Western men, but no one has really been able to prove it. In what is now the largest and most comprehensive study of its kind, scientists have presented compelling evidence in support of this rather alarming assertion, showing that sperm counts have dropped more than 50 percent in just four decades.
It turns out the recognizable half-circle arch of a rainbow is a complete lie. When you’re standing on the ground looking up at a rainbow in the sky, the curvature of the Earth usually blocks its bottom half. But when viewed from a higher vantage point, like from a plane, or the top of a crane, rainbows are magically revealed to be a complete circle.