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Earth & Environment

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Epipedobates anthonyi

SMALL BUT DEADLY  The potent toxin epibatidine was first discovered in 1974, when it was isolated from the skin of the phantasmal poison frog, Epipedobates anthonyi (one shown).

Yosemite National Park’s Half Dome

ROCK OF AGES  Plate tectonics may have started as early as 3.5 billion years ago on Earth. That recycling of Earth’s surface leads to the separation of light-colored continental crust (exposed here at Yosemite National Park’s Half Dome) from darker, denser oceanic crust.  

hurricane Irma

IRMA INCOMING  Hurricane Irma passed by Cuba on September 8, 2017, as a Category 4 storm (seen in this geocolor image captured by NOAA’s GOES-16 satellite) before making landfall in the Florida Keys on September 10, 2017.

Earth & Environment

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