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USA: North America’s tallest peak, Alaska’s Mount McKinley, may have been taken down a notch.

An effort to update decades-old maps using aircraft-mounted radar technology showed the mountain, called Denali by locals, stands at 20,237 feet (6,168 metres).

That’s 83ft (25m) shorter than an estimate of 20,320ft (6,194m) from the early 1950s.