Blue Whales

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Blue Whales are the biggest creatures in the world. They are the lenghth of 3 school buses and their toungues are as big as a elephant. Researchers have been sailing on the southern ocean. The researches said it was like looking for a needle in a hay sack. Researches have now discovered a listening technology to hera the Whales songs.
Looking for more information at http://www.abc.net.au/btn/ or more Whales information at
http://www.abc.net.au/btn/video/explained-whaletracking.mp4

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