The wee electron has gotten its most thorough physical examination yet, and scientists report that it is almost, almosta perfect sphere. Researchers at Imperial College London have determined the electron is just 0.000000000000000000000000001 centimeter off from being perfectly round. Put another way, if the electron was magnified to the size of the solar system, it would deviate from immaculate rotundity by a magnitude equivalent to a human hair.
As if having trouble conceiving a child wasn't painful enough, the current method of male fertility testing adds to that misery with multiple trips to the doctor, awkward moments in sterile rooms, and lengthy waits while lab technicians painstakingly count out individual sperm. A newly developed chip may change that, and provide a fast, at-home method for anyone to test their sperm count.
The Bodybugg is like having a personal trainer strapped to your triceps. The 2.9-ounce gadget uses four sensors to calculate your energy expenditure with 92 percent accuracy&8212;on par with in-the-lab measurements. An accelerometer tracks your movement; two thermometers gauge body
temperature (one's for your core, the other for skin); and a
galvanic-skin-response sensor measures sweat. Upload the data to bodybugg.com, and the site will chart your daily calorie burn against your intake. $500
Five amazing, clean technologies that will set us free, in this month's energy-focused issue. Also: how to build a better bomb detector, the robotic toys that are raising your children, a human catapult, the world's smallest arcade, and much more.