Rhizocarpon geographicum

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[Image: Yellow map lichen, by Freeman Patterson].

Yellow map or world map lichen is frequently used in lichenometry, a geobotanical technique employed to estimate the age of exposure of a rock surface. Since Rhizocarpon geographicum quickly colonizes newly-exposed rock surfaces and has a known rate of growth, geologists can, for example, examine glacially-deposited rocks and determine the rate of glacial retreat.

via ubcbotanicalgarden.org

Personalized electronics; electronic personalities

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I love this Etsy store's items. I saw the Snow White one originally, and the Iron Man one more recently... and want them both! But I feel equally reluctant to deface my new Mac.

In lieu of sticky vinyl commitment, I like to name my electronics, usually based on their aesthetic qualities and the sort of personality those qualities might connote. Following my Philips HDD6330 (Phthalo) and its successor, a red Samsung K3 (Vandross), I'm thinking of naming the MBP either Verkhoyansk or Sagarmatha. Not that I'd ever refer to it as such out loud, but somehow the aluminum unibody just suggests icy, remote regions? Let me know if I'm completely out of my mind.