Old Tech, New Uses

Did you know that you can get leeches via express mail-order? And, get this, the big market for this service is the finger-reattachment-surgery community. It turns out that in the newly-restored digit, the arteries recover faster than the veins, which means that there can be blood drainage problems and fluid buildup in the fingertip. Solution: good old-fashioned blood-sucking leeches.