LiveScience: Last month was the warmest May ever measured on Earth in 134 years, the National Oceanic and Atmospheric Administration (NOAA) announced today (June 23).
The record warmth comes from a combination of global warming and a natural climate pattern in the Pacific Ocean called El Nio, scientists think.
Several regions around the world suffered record heat in May, while a few were colder than average, but NOAA looks at the planet's overall temperature to gauge global trends. The average combined...