Lionfish are native to the South Pacific and Indian Oceans, but they've taken hold in the Atlantic and Caribbean, without many natural predators to keep them in check. Benjamin Lowy/Getty Images hide caption
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The scene found in Indonesia shows, among other things, hunters confronting a wild buffalo with ropes and spears. Adam Brumm/Nature hide caption
44,000-Year-Old Indonesian Cave Painting Is Rewriting The History Of Art
Swedish climate activist Greta Thunberg was named Time magazine's person of the year for showing "what it might look like when a new generation leads." She's seen here at the COP25 Climate Conference in Madrid on Wednesday. Pablo Blazquez Dominguez/Getty Images hide caption
Homes destroyed by Cyclone Idai litter the riverbanks of Buzi district, Mozambique. Weather forecasters there say they do not have all the resources they need to cope with more extreme weather affecting the country as a result of climate change. Nichole Sobecki/VII for NPR hide caption
Nearly 30 years after the passage of the Americans with Disabilities Act, planes still lag behind many buses and trains. Regulations prohibit passengers from sitting in their own wheelchairs on commercial flights. Jon Hicks/Getty Images hide caption
Smoke billows from White Island after a volcanic eruption on Monday. Officials say some people remain unaccounted for and it remains too dangerous for emergency services to access the island. George Novak/AP hide caption
The United Launch Alliance Delta IV Heavy rocket launches NASA's Parker Solar Probe to touch the Sun on Aug. 12, 2018 from Launch Complex 37 at Cape Canaveral Air Force Station. Bill Ingalls/NASA hide caption
Activists demonstrated against virginity tests in New Delhi in 2009. Raveendran/AFP/Getty Images hide caption
Biologists pile recently dead mussel shells on the edge of the Clinch River after documenting the species' number and type. The smell can get "real bad," says biologist Rose Agbalog. Nathan Rott/NPR hide caption
A humpback whale feeds on a school of fish off Long Island, New York. Migrating whales have increased dramatically in this region in recent decades — but they're also facing human challenges. David 'Dee' Delgado/WCS/Ocean Giants/Image taken under NMFS MMPA/ESA Permit no. 18786-04 hide caption
The comet 2I/Borisov as imaged by the Hubble Space Telescope on October 12. Borisov will swing by the sun and then head back into deep space. NASA, ESA and D. Jewitt (UCLA) hide caption
A Comet From Another Star Hints That Our Solar System Isn't One-Of-A-Kind
Dr. Laurie Punch, a trauma surgeon at Barnes-Jewish Hospital in St. Louis, is adamant that violence is a true medical problem doctors must treat in both the operating room and the community. Whitney Curtis for KHN hide caption
CBD can be extracted from marijuana or from another strain of the cannabis plant, hemp. Getty Images hide caption
The sun, illustration. KTSDesign/Science Photo Library/Getty Images hide caption
Probe Gets Close To The Sun — Finds Rogue Plasma Waves And Flipping Magnetic Fields
Babies in their cribs at Lambano Sanctuary, a hospice for orphaned children with HIV in Gauteng, South Africa. Andrew Aitchison/Pictures Ltd./Corbis/Getty Images hide caption
A load of wood enters a wood pellet plant operated by Enviva Partners in Sampson County, N.C. Enviva is one of the largest producers of wood pellets in the U.S. Dan Charles/NPR hide caption
Europe Is Burning U.S. Wood As Climate-Friendly Fuel, But Green Groups Protest
Transmission electron micrograph of AIDS, HIV-1 Callista Images/Getty Images hide caption