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Earth

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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.

portable tower for measuring wind speed

Engineer Jon Sinnreich of the University of Florida and colleagues work on a portable tower used to measure wind speeds during Hurricane Irma. Scientific data from hurricanes and other natural disasters help inform efforts to prepare for future crises.  

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