Have you heard of the person who got part of a needle stuck in his hand and it came out 10 years later through his foot? Strange things like this do happen. It is the body's way of safely ridding the body of potentially dangerous objects. Work on Australian frogs show they deal with such things in a different way. Tiny bead-like radio transmitters were implanted into frogs. They were put into body cavities of frogs and even toads. Oddly, the small devices disappeared. The beads moved along the body into the bladder where they were, in due course, fully expelled from the body. This may sound like something quite obvious and unremarkable until one is informed that the beads were two centimeters long and some of the frogs were only eight centimeters long. It is no mean feat for such a small animal. It was discovered that tissue from the bladder grows out and envelopes the foreign object. The object is then drawn into the bladder. Apparently, frogs have evolved this to rid their
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