"The warmest year on record so far may have claimed another milestone, and this time it's a big one.

According to preliminary data from NASA along with information from the Japan Meteorological Administration, July 2015 was the warmest month on record since instrument temperature records began in the late 1800s.

Research using other data, such as tree rings, ice cores and coral formations in the ocean, have shown that the Earth is now the warmest it has been since at least 4,000 years ago."

Andrew Freedman reports for Mashable August 18, 2015. [2]