80 year-old Japanese adventurer Yuichiro Miura poses on Mount Everest
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80-year-old Yuichiro Miura claims new Everest record

23 May 2013 Last updated at 16:36 BST

An 80-year-old Japanese mountaineer has become the oldest person to reach the summit of Mount Everest.

Despite a history of heart problems, Yuichiro Miura, who climbed Everest when he was 70 and then again at 75, reached the peak early on Thursday morning.

But it is a record that could be short-lived, as Tom Bayly reports.