Recruiting patients for medical studies has been challenging during the pandemic, especially older people who are more vulnerable to COVID-19. Dra_Schwartz/Getty Images hide caption
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Climate change means more flooding in much of the U.S. as sea levels rise and extreme rain becomes more common. Many people who live in flood-prone areas do not know they are at risk. Ryan Kellman/NPR hide caption
In his book How To, Randall Munroe explores whether you could open enough water bottles to fill a swimming pool — using nuclear weapons. Riverhead Books hide caption
Mental health advocates say 988, a simple three-digit number, will be easier for people to remember in the midst of a mental health emergency. T2 Images/Getty Images/Cultura RF hide caption
This mosaic image of asteroid Bennu is composed of 12 images collected on Dec. 2, 2018 by the OSIRIS-REx spacecraft from a range of 15 miles. NASA/Goddard/University of Arizona hide caption
If This NASA Spacecraft Can Avoid 'Mount Doom,' It Might Nab A Bit Of Asteroid
Conceptual artwork of quantum entanglement, one of the consequences of quantum theory. Two particles will appear to be linked across space and time, with changes to one of the particles (such as an observation or measurement) affecting the other one. Mark Garlick/Getty Images/Science Photo Libra hide caption
The Washington State Department of Agriculture team tracked the Asian giant hornet for about an hour earlier this month, before losing her signal in a forest. Courtesy of the Washington State Department of Agriculture hide caption
Rebecca Knill speaks at TED@WellsFargo, February 5, 2020, at the Knight Theater in Charlotte, NC. Photo: Ryan Lash / TED Ryan Lash/Courtesy of TED hide caption
Rebecca Knill: Technology Has Come So Far—When Will Our Mindset Catch-Up?
Dallas Taylor speaks as part of TED2020: Uncharted. May 21, 2020. Photo courtesy of TED. Courtesy of TED/Courtesy of TED hide caption
jimhudspeth_2019s-embed Ryan Lash/Courtesy of TED hide caption
Jim Hudspeth: How Do We Hear — And How Do We Lose Our Ability To Hear?
Emily Garti, a junior studying nutrition, gets her twice-weekly COVID-19 test at the University of Illinois at Urbana-Champaign. Elissa Nadworny/NPR hide caption
Tobacco plants are being used in the development of COVID-19 vaccines. One is already being tested in humans. Rehman Asad/Barcroft Media via Getty Images hide caption
Tobacco Plants Contribute Key Ingredient For COVID-19 Vaccine
Dr. Anthony Fauci, director of the National Institute of Allergy and Infectious Diseases, says Thanksgiving gatherings could cause coronavirus cases to rise even faster than they already are. Graeme Jennings/POOL/AFP via Getty Images hide caption
Pandemic 'Halftime': U.S. Looks At Lessons Learned As Fall & Holidays Near
"The excitement for me has been to slowly uncover the secret lives of many of these cryptic animals," says Craig Foster. "My incredible octopus teacher, she helped me in many ways to uncover many of those lives, because she's in the middle of this food web." Netflix hide caption
Filmmaker Finds An Unlikely Underwater Friend In 'My Octopus Teacher'
Brain cells that monitor liquid, mineral and salt levels in the body influence what types of drinks we crave when thirsty. Krisanapong Detraphiphat/Getty Images hide caption
Water Or A Sports Drink? These Brain Cells May Decide Which One We Crave
The number of people dying from COVID-19 since May 10 is on average 50% higher than every other country in the study, adjusting for population size. Spencer Platt/Getty Images hide caption
Police stand guard outside of a rally with Vice President Pence at Weldall Manufacturing on Tuesday in Waukesha, Wis. Wisconsin is currently seeing a surge in coronavirus cases at the same time that the number of daily cases nationally is rising. Scott Olson/Getty Images hide caption
NASA's New Horizons spacecraft captured this high-resolution enhanced color view of Pluto on July 14, 2015. NASA/Johns Hopkins University Applied Physics Laboratory/Southwest Research Institute hide caption
A health care worker tests a patient for the coronavirus in Nevada in July. Scientists say a 25-year-old Nevada man was infected with the virus twice. It is the first confirmed case of reinfection in the U.S. John Locher/AP hide caption
Monarch butterflies, like this one in Temascaltepec, Mexico, use ultraviolet polarized light to help them navigate in flight. Omar Torres/AFP via Getty Images hide caption
Butterflies Have Hearts In Their Wings. You Won't Believe Where They Have Eyes
NASA's diagram of Mars opposition shows the Sun, the Earth and Mars lining up every couple of years. The National Aeronautics and Space Administration hide caption
Grey reef sharks, seen in Fiji, are among the top species of sharks fished for their liver oil. Reinhard Dirscherl/Ullstein Bild via Getty Images hide caption