Emissions rise from the Duke Energy coal-fired Asheville Power Plant ahead of Hurricane Florence in Arden, N.C., in September 2018. Regulators are supposed to make sure Duke Energy delivers reliable power at the lowest possible cost — and that's always been interpreted as cost to the consumer, not cost to the environment. Charles Mostoller/Bloomberg via Getty Images hide caption
A boy jumps into the water of the Trocadero Fountain in Paris on Friday, to find relief from the heat wave. Zakaria Abdelkafi/AFP/Getty Images hide caption
This graphic shows the path of Tuesday's solar eclipse and how much you can see from different places. The yellow band represents the path of totality, or the areas in which a total eclipse will be visible. Other areas will be able to see a partial solar eclipse. Michael Zeiler, greatamericaneclipse.com hide caption
A child in Charlottesville, Va., uses eclipse glasses to safely watch the August 2017 solar eclipse. NPR hide caption
An artist has reconstructed what ancient crocodile ancestors looked like, including some that very likely ate plants. Jorge Gonzalez hide caption
This illustration shows NASA's Dragonfly rotorcraft lander approaching a site on Saturn's exotic moon, Titan. NASA/JHU-APL hide caption
Thousands of monarch butterflies gather in the eucalyptus trees at the Pismo State Beach Monarch Butterfly Grove. George Rose/Getty Images hide caption
Researchers trained Zola the seal to "sing" the Star Wars theme song. Courtesy of Amanda Stansbury hide caption
Chris Marshall has organized pop-up Sans Bars in New York, Washington, D.C., and Anchorage, Alaska. And he has expanded into permanent spaces in Kansas City, Mo., and western Massachusetts. Julia Robinson for NPR hide caption
CRISPR technology already allows scientists to make very precise modifications to DNA, and it could revolutionize how doctors prevent and treat many diseases. But using it to create gene-edited babies is still widely considered unethical. Gregor Fischer/picture alliance via Getty Images hide caption
Researchers dropped more than 17,000 wallets with varying amounts of money in countries around the world. Here, an example of the wallets that held the most money. Christian Zünd hide caption
This oblique view of the Himalayan landscape was captured by a KH-9 Hexagon satellite on Dec. 20, 1975, on the border between eastern Nepal and Sikkim, India. Josh Maurer/LDEO hide caption
The Environmental Protection Agency's final version of its Affordable Clean Energy rule is supported by the coal industry, but it's not clear that it will be enough to stop more coal-fired power plants from closing. J. David Ake/AP hide caption
Boaty McBoatface, an autonomous submarine vehicle, had a successful first mission taking measurements deep in the Southern Ocean. Povl Abrahamsen, British Antarctic Survey hide caption