Elephant seals equipped with electronic sensors help oceanographers study ocean currents under Antarctic ice.
They can swim to a coastline area inaccessible to ships.
The Antarctic Bottom Water is a dense, deep layer near the ocean floor that drives ocean circulation.
Read more here: http://www.dailymail.co.uk/sciencetech/article-2284722/Elephant-seals-wearing-head-sensors-help-scientists-uncover-mystery-ocean-engine-the-Antarctic.html
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