I THINK IT WAS Aristotle who first said that Nature abhors a vacuum. Others, such as Hobbes, Boyle, and Newton, climbed onto Aristotle’s soapbox at a much later date. But for all their collective brains, these brilliant boys got it only half right. Nature does abhor a vacuum, but she equally abhors pressure. If you stop to think for even a second, it should be obvious, shouldn’t it?