Began at 7:00 PM - Washington Week with Gwen Ifill
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Tiddalick the frog's puddle jumping is using up water and leaving his neighbors in the dust.
This film investigates the parallel stories of collapsing Pacific salmon populations and how biologists and engineers engage in audacious experiments to shore up their numbers. Each of our efforts to save salmon has involved replacing their natural cycle of reproduction and death with a radically manipulated life history.
He finds what building materials will make a boat float and learns about momentum while skating.