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Fossil of 85-foot blue whale is largest ever discovered
How whales and dolphins may be harmed by oil prospectors' …
These endangered whales are disturbingly thin. Here's why.
Whale Watching - National Geographic
Orcas eat great white sharks—new insights into rare behaviour …
Porpoises - National Geographic
Topics, authors and photographers: b | National Geographic
Seals - National Geographic
Homepage | National Geographic
Hostile Planet - National Geographic