A map of neurons of the mouse retina, reconstructed automatically by artificial intelligence from electron microscopic images. A. Zlateski based on data from K. Briggman, M. Helmstaedter, and W. Denk/MIT/Seung hide caption

itoggle caption A. Zlateski based on data from K. Briggman, M. Helmstaedter, and W. Denk/MIT/Seung

After the earthquake, workers were sent inside Reactor 1 at the Fukushima plant to release some of the pressure building up inside the reactors. Frontline hide caption

itoggle caption Frontline

Farmer Alan Madison fills a seed hopper with Monsanto hybrid seed corn near Arlington, Illinois, U.S. A group of organic and other growers say they're concerned they'll be sued by Monsanto if pollen from seeds like these drift onto their fields. Daniel Acker/Landov hide caption

itoggle caption Daniel Acker/Landov

Astrophysicist Neil deGrasse Tyson says valuing space exploration "transforms the culture into one that values science and technology." AP hide caption

itoggle caption AP

Pinwheels like these are often used to test nerve responses. iStockphoto.com hide caption

itoggle caption iStockphoto.com