2015 was the hottest year in recorded history

A record-setting year.
(Image credit: iStock)

2015 was by far the hottest year in all of recorded history, scientists announced on Wednesday; it has previously been reported that it was the second-hottest year in the continental United States. Meteorologists suspected a global temperature record was possible months ago as part of one of the largest El Niños of the century, although scientists also pinned blame on climate change caused by emissions of greenhouse gases.

"The whole system is warming up, relentlessly," Gerald A. Meehl, a scientist at the National Center for Atmospheric Research, told The New York Times. Back-to-back records in both 2014 and 2015 indicate the world is not just warming, but doing so rapidly; climate scientist Michael E. Mann estimates that if the global climate were not warming, the odds of breaking records in consecutive years is one in every 1,500 pairs of years.

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Jeva Lange

Jeva Lange was the executive editor at TheWeek.com. She formerly served as The Week's deputy editor and culture critic. She is also a contributor to Screen Slate, and her writing has appeared in The New York Daily News, The Awl, Vice, and Gothamist, among other publications. Jeva lives in New York City. Follow her on Twitter.