A home burns during the Camp Fire in Paradise, Calif., in November 2018. It was one of several fires often discussed in terms of the changing climate. A new survey shows a jump in the number of Americans who are "very worried" about global warming. Josh Edelson/AFP/Getty Images hide caption
A scanning electron micrograph shows microglial cells (yellow) ingesting branched oligodendrocyte cells (purple), a process thought to occur in multiple sclerosis. Oligodendrocytes form insulating myelin sheaths around nerve axons in the central nervous system. Dr. John Zajicek/Science Source hide caption
Slow carbs like whole-grain breads and pastas, oats and brown rice are rich in fiber and take more time to digest, so they don't lead to the same quick rise in blood sugar that refined carbs can cause. fcafotodigital/Getty Images hide caption
The key to making the quintessential biscuit of the American South, like these from Callie's Charleston Biscuits Bakery in Charleston, S.C., is more about technique than a specific flour, some bakers say. Brett Flashnick/The Washington Post/Getty Images hide caption
Lake Elsinore, Calif., was drenched Thursday by a storm that dropped rain and snow across much of the state. The National Weather Service is providing forecasts and warnings as usual, but employees are working without pay. Jae C. Hong/AP hide caption
A "blood moon" seen from western Germany during a total lunar eclipse on Sept. 28, 2015. Patrik Stollarz/AFP/Getty Images hide caption
A curious harbor seal checks out diver Mike Weber as he and other divers pick up golf balls in the waters off the coast of Northern California. His daughter wrote a paper about all the golf balls found in the ocean from nearby golf courses. Courtesy of Alex Weber hide caption
President Trump called for a beefing up of existing defenses, such as the Aegis ashore system pictured. In addition, he called for research into new advanced concepts. Mark Wright/Missile Defense Agency hide caption
The NASA/ESA Hubble Space Telescope observed Saturn on June 6. NASA, ESA, A. Simon (GSFC) and the OPAL Team, and J. DePasquale (STScI) hide caption
Researchers studying mouse brains identified the cells that encode pain's unpleasantness. Sally Anscombe/Getty Images hide caption
Even something as simple as chopping up food on a regular basis can be enough exercise to help protect older people from showing signs of dementia, a new study suggests. BSIP/UIG/Getty Images hide caption
An image, from a scanning electron micrograph, of Heterorhabditis megidis nematode worms (colored blue). These parasitic worms harbor a bacteria that repels mosquitoes. Steve Gschmeissner/Science Source hide caption
The ice disk is seen spinning on the Presumpscot River in drone video image provided by the city of Westbrook, Maine. Tina Radel/AP hide caption
The China National Space Administration's lunar lander, seen on Jan. 11. China National Space Administration/Xinhua News Agency/AP hide caption
Surgeons performed more than 21,000 kidney transplants and 8,000 liver transplants in 2018, according the United Network for Organ Sharing. shapecharge/Getty Images hide caption
Americans now have a 1 in 96 chance of dying from an opioid overdose, according to new analysis from the National Safety Council. Spencer Platt/Getty Images hide caption
