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Comet Caused 6th Century ‘Nuclear Winter’

Comet Caused 6th Century 'Nuclear Winter'

Comet Caused 6th Century 'Nuclear Winter'

Scientists at Cardiff University, UK, believe they have discovered the cause of crop failures and summer frosts some 1,500 years ago 锟 a comet colliding with Earth.

The team has been studying evidence from tree rings, which suggests that the Earth underwent a series of very cold summers around 536-540 AD, indicating an effect rather like a nuclear winter.