* Astronomy

Decade of tagging has mapped predatorial pathways in the north Pacific Ocean.

Two vast areas of the north Pacific Ocean, one off the west coast of the United States and the other between Hawaii and Alaska, have been revealed as marine counterparts of East Africa's Serengeti plain. Teeming with life, these oceanic 'hotspots' provide major migration corridors for large marine predators ranging from tuna to whales.
The discovery comes from a huge data set that synthesizes and compares the seasonal migration patterns of 23 species of predators. The findings are published today in Nature
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