Today’s wolves and dogs share a common ancestor. But a deeper look at their genes reveals that interbreeding since dogs were domesticated 20,000 years ago hasn’t been as rare as scientists assumed.

A major bridge linked to a hydropower plant in southwestern China crumbled on Tuesday, chunks of concrete and steel smashing into the river below—mere months after it had reopened. The Hongqi Bridge, a key stretch of the G317 national highway in Sichuan’s mountainous Maerkang area, gave way in dramatic fashion, Chinese state media revealed. Officials confirmed the disaster but stressed, luckily, no deaths or injuries. Truth is, they’d already spotted trouble brewing. Cracks had spiderwebbed acro

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