The male murder hornet was the first to be caught in a trap in Washington state.
Researchers also found evidence to suggest wasps had killed a number of other nestlings in the area.
Using carbon extracted from wasp nests, scientists were able to date Australian rock art to a period of sea level rise and social disruption.
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City authorities in Weingarten are running checks for more hornet nests as hikers spend the final days of summer outdoors.
Scientists named them Xenomorphia, after the bloodthirsty, chest-splitting creatures from the Alien movies.
The insect features a trio of spines along its back, like a stegosaurus.
The swarm of wasps sounded like a hailstorm.
The spider can do nothing as it becomes home to the progeny of its own enemy.