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A Monarch butterfly lands on a branch of an Oyamel tree January 29, 2001 at the butterfly sanctuary in Michoacan, Mexico.
Migrating monarch butterfly navigation mystery finally solved

ByChristian Pepito | Apr 18, 2016 04:58 AM EDT

The new regulation was formulated in light of recent mountaineering accidents that occurred in Sichuan Province.
Color Of Light, Not Luminosity, Has Highest Impact On Body Clock

BySovan Mandal | Apr 20, 2015 12:44 PM EDT

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