A grizzly bear roams near Beaver Lake in Yellowstone National Park, Wyo., in 2011. Jim Urquhart/AP hide caption
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A map of the United States shows where and how much of the eclipse will be visible, including path of totality from Oregon to South Carolina. NASA hide caption
Patrick McGovern, scientific director of the Biomolecular Archaeology Project at the University of Pennsylvania Museum, delves into the early history of fermentation in his latest book. Courtesy of Alison Dunlap hide caption
Researchers monitored the health of these wild bees, from the species Osmia bicornis. They nest inside small cavities, such as hollow reeds. Courtesy of Centre for Ecology & Hydrology hide caption
Pesticides Are Harming Bees — But Not Everywhere, Major New Study Shows
The bacterium that causes the plague travels around on fleas. This flea illustration is from Robert Hooke's Micrographia, published in London in 1665. Getty Images hide caption
Potential annual damages are shown on the county-level in a scenario in which emissions of greenhouse gasses continue at current rates. Negative damages indicate economic benefits. Hsiang, Kopp, Jina, Rising, et al./Science hide caption
C. diff infections, which rose for decades, are now falling, according to the CDC. David Phillips/Science Source hide caption
Boaty McBoatface undergoes preparations last year in Birkenhead, England. By the assessment of the British Antarctic Survey, Boaty discharged its duties on its inaugural voyage surpassingly well. Christopher Furlong/Getty Images hide caption
Billy Crook's commercial crabbing boat, Pilot's Bride. He says it's looking like it's going to be a good year for crabbing on the Chesapeake Bay. Selena Simmons-Duffin/NPR hide caption