MARY LOUISE KELLY, HOST:
There are prehistoric giants gliding through the depths of some U.S. rivers. A type of fish called lake sturgeon has been around since the time of the dinosaurs. But in the past century, populations have plummeted. As St. Louis Public Radio's Shahla Farzan reports, Missouri scientists are using tracking devices on this endangered species to try to prevent its extinction.
SHAHLA FARZAN, BYLINE: The lake sturgeon is a strange-looking fish with a curved snout, tail like a shark and long whiskers near its mouth. Adults can be huge, growing longer than a king-size bed and weighing hundreds of pounds.
