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In our everyday classical world, what you see is what you get. A ball is just a ball, and when lobbed through the air, its trajectory is straightforward and clear.

Last month wrapped up a remarkably warm meteorological autumn across the U.S., with the season ranking as the sixth-warmest autumn on record for the nation, according to scientists from NOAA’s National Centers for Environmental Information (NCEI).

When it comes to greenhouse gases, methane is one the biggest contributors.

Nutrient runoff from agricultural production is a significant source of water pollution in the U.S., and climate change that produces extreme weather events is likely to exacerbate the problem. 

In its latest accounting, the International Union for Conservation of Nature finds that more than 44,000 species worldwide are threatened with extinction.