2014 set a new mark for the hottest year on record. And while unprecedented heat has become almost common place, it's been a long time since the world set any global cold records.
Nearly all of the planet's warmest years on record have occurred in the past 15 years. Is that just a coincidence? Climate Central calculates the probability.
Thanks to NASA, you only need 30 seconds to see how the world has warmed over the past 135 years.
So who or what is this El Niño that meteorologists warn may affect our weather in a big way?
Updated to include 2013, this amazing 14-second NASA animation depicts how the globe has warmed since 1950.
Scientist Jeff Privette explains how what's seen from the sky can tell us a lot about our climate on Earth.
Climate scientist Deke Arndt explains the Climate Extremes Index and the critical information it contains.
Climate scientist Anthony Arguez explains the importance of “normals” in this version of Tell Me Why.