Scientific Minds Want To Know
![]() | ![]() | Astronomers work out the size of a distant icy object by watching it pass in front of a bright star. |
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The biggest living thing with teeth
![](http://www.newscientist.com/data/images/ns/cms/dn19046/dn19046-1_300_thumbnail_70_100.jpg)
It hunts the largest squid in the world, and helps combat climate change in the process. How does the sperm whale do it?
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