The tropics are teeming with life, tending to hold far more species than milder environments closer to the poles. But one group of insects, the Darwin wasps, were thought to buck that trend.
Researchers who compared wasp diversity in the United Kingdom and the United States with tropical areas in the 1970s and ’80s concluded that these wasps were most diverse at mid-latitudes — say, Kentucky or England. But others thought that people just weren’t looking hard enough in the tropics.
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