Giant hornets injure thousands

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Swarms of giant hornets have killed 42 people and injured 1,640 in Shaanxi province in China, according to a local news agency.

Giant hornets can grow up to 5cm long and have a powerful sting.

Experts say the building of people's homes in their natural habitat could be to blame for the increase in attacks.

Authorities are destroying nests and trying to warn the public.

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