This summer one man has decided to celebrate his 77th birthday by riding his bike 400 miles from Astoria, Oregon, to Crescent City, California. Joe Blumenthal, a cardiologist and instructor at University of California, San Francisco, has been bicycling extreme distances for years, riding 1,000 miles from British Columbia to Point Reyes Station—his hometown—in 2006, 750 . . .

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