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Tagging and Satellite Tracking Reveals Mystery of Blue Whales

Balancing in small boats in choppy Antarctic waters, sometimes for hours and covered in ice, Australian researchers shot at endangered blue whales with an air gun to tag the giant creature with satellite tracking equipment.

For three years the team of scientists from the Australian Antarctic Division tagged the world's largest creature and then tracked the rarely seen whales using sonar attached to special buoys to gain an insight into the threatened species.

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