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Pet owners are turning to veterinary medicine for costly treatments of their fish. 06:18
Full Program: Why do huge swarms of rats overrun a bamboo forest in India once every half-century? 52:46
These brainy marine mammals can "read," plan ahead, and communicate in astounding ways. 10:51
Watch visualizations of Einstein's thought experiments. 03:13
The ability to read is not just limited to humans. The trainers at Roatan Institute for Marine Sciences in Honduras have trained their dolphins to read two-dimensional symbols as commands. In this... 02:53