OTAGO, New Zealand, Feb. 5 (UPI) -- The pre-Ice Age North Pacific included odd species of marine mammals like dwarf whales, double-tusked walruses and porpoises with underbites, a scientist says.
Doctoral student Robert Boessenecker of New Zealand's University of Otago said he identified 21 ancient marine mammals from fossil bones and teeth found in exposed rock layers in the San Francisco Bay area.