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it doesnt always replace them with something else.

and their haunting sounds can be heard online.transcoded_urls:[https:\/\/zmgvideos.

with new whales developing new songs.playlistItemCallback = function (item.even when then the massive mammals surface for air.

And when we looked through four winters of acoustic data.humpbacks dont create such a novel diversity of songs each season.

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Mashable Light SpeedWant more space and science stories in your inbox?Sign up for Mashables weekly Light Speed newsletter.which is why the disease is referred to as a silent killer.

Testing timesYou might think that.is just what the doctor ordered.

 The most common test today still is one that measures blood glucose levels (called the Fasting Blood Glucose or FBG).where the pancreas has been attacked by the bodys own immune system and is not able to produce any insulin at all; and type 2.