A hiker hangs out next to Clouds Rest peak in Yosemite National Park. In Yosemite, precarious granite attachments – geologists call them “exfoliations” – fall at a rate of one a week, on average.
A hiker hangs out next to Clouds Rest peak in Yosemite National Park. In Yosemite, precarious granite attachments – geologists call them “exfoliations” – fall at a rate of one a week, on average. Reed Parsell The Sacramento Bee, file
A hiker hangs out next to Clouds Rest peak in Yosemite National Park. In Yosemite, precarious granite attachments – geologists call them “exfoliations” – fall at a rate of one a week, on average. Reed Parsell The Sacramento Bee, file

Yosemite’s granite cliffs are ‘breathing,’ and heat can make them fall

March 28, 2016 06:28 PM

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