AdvertisementScientists Report The Planet Was Hotter Than Ever In The First Half Of 2016July 19, 2016Christopher JoycefacebookEmailA heat-stressed koala is doused with water in December 2015 during an extreme heat wave in Adelaide, Australia. Last year was the hottest on record, but 2016 is on pace to supplant it at the top of the list. Every month of this year has set heat records. (Getty Images)