Your mouth is full of bugs. Actually your saliva, which is teaming with hundreds of types of bacteria, is the culprit. Some of these bacteria are helping you out—digesting your food, for example—while others might be causing cavities or bad breath (Altoids, anyone?). But according to a new report published this week, the bacteria in your saliva could indicate how healthy you are, where your ancestors came from, and even act as stand-in fingerprint for identifying you.
Her lasers could serve as early-warning
systems for terrorism.
By JR MinkelPosted 10.29.2004 at 6:00 pm 0 Comments
When Claire Gmachl worked at Bell Labs, she had a parlor trick that never failed to delight visitors. She would place a lens a few inches from a laser and clamp a matchstick six inches in front of the lens. Then she’d use the lens to focus the laser’s invisible infrared beam onto the matchtip, and voil! She could light a match without touching it. You might think a scientist would be glad to have an entertaining way to show off the power of her devices. But to tell the truth, Gmachl found the exercise a bit “dorky.” She has little patience for distractions.