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The songs typically lasted between hours and days.created_at:2018-03-23T19:57:15.

SEE ALSO:Rhino experts arent banking on unproven IVF technology to rescue threatened speciesAfter listening to and analyzing three years of bowhead audio recordings.marine researchers say theyve recorded bowheads singing an unprecedented number of songs.and only rarely did a song continue to be in use for a month.

But as far as scientists can tell.com\/cms\/2018\/3\/65bd8512-255c-0320\/hls.

com\/cms\/2018\/3\/65bd8512-255c-0320\/mp4\/1080.

Credit: Kate Stafford/University of WashingtonBetween 2010 and 2014.Mashable Light SpeedWant more space and science stories in your inbox?Sign up for Mashables weekly Light Speed newsletter.

a 17-megawatt solar panel installation on the roof and biogas fuel cells bring in clean energy.SEE ALSO:Google bought more renewable energy than it needed last yearReaching 100 percent renewables has been a years-long mission.

playlistItemCallback = function (item.Apple has convinced nine more suppliers to power all of their Apple production with 100 percent clean energy.