There is less than a 1-in-27 million chance that Earth's record hot streak is natural

January 16, 2015 3:32 PM

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Although it may not have been warm where you live, scientists announced Friday that 2014 was the Earth's hottest year since record-keeping began in 1880. The climate milestone was made possible in large part by exceptionally mild ocean temperatures and above-average temperatures on most continents.

Remarkably, the warmth came without the assistance of an El Niño event in the tropical Pacific Ocean. These events are naturally occurring ocean and atmospheric cycles that tend to boost global temperatures. Previous El Niños have been responsible in part for the prior warmest years, such as 1998 an...

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