For a scientific experiment, a man sits in front of a computer, and an EEG measures the electrical signals released by neurons in his brain. Getty Images hide caption
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Potential COVID-19 vaccines are kept in a tray at Novavax labs in Maryland on March 20. The Novavax vaccine requires an immune-boosting ingredient called an adjuvant to be effective. Andrew Caballero-Reynolds/AFP via Getty Images hide caption
Researchers uncover why shaving can cause sharp blades to dull quickly. Gustavo Rezende Dos Santos/EyeEm/Getty Images hide caption
Lawmakers in California say the state's pattern of single-family zoning is boosting carbon emissions. ullstein bild/via Getty Images hide caption
A woman carrying her mask walks past a sign mandating the wearing of face coverings in Palisades Park in Santa Monica on July 25. Robyn Beck/AFP via Getty Images hide caption
Virginia Gov. Ralph Northam speaks during a news conference in Richmond, Va. on June 4. Virginia has rolled out a smartphone app to automatically notify people if they might have been exposed to the coronavirus. Steve Helber/AP hide caption
Conner Curran, 9, (right) and his brother Will, 7, at their home in Ridgefield, Conn. The gene therapy treatment that stopped the muscle wasting of Conner's muscular dystrophy two years ago took more than 30 years of research to develop. Kholood Eid for NPR hide caption
Scientists in Canada have diagnosed malignant cancer for the first time in a dinosaur, a Centrosaurus apertus from 76 to 77 million years ago. Sergey Krasovskiy/Stocktrek Images/Getty Images hide caption
Farmers work during a harvest in Jutland, Denmark. People keep worrying about food shortages. Some economists say the fears actually create their own problems. Nick Brundle Photography/Getty Images hide caption
Food Is Growing More Plentiful, So Why Do People Keep Warning Of Shortages?
Vaccine-makers are readying 190 million doses of the flu vaccine for deployment across the U.S. this fall — 20 million more doses than in a typical year. A nasal spray version will be available, as well as shots. Justin Sullivan/Getty Images hide caption
British archaeologists work, on October 2, 2009, at the ruins of an arena built early in the third century BC outside Ostia, the ancient imperial port near Rome. Sarah Parcak's work using satellite imagery and data led to the discovery of the site. Vincenzo Pinto/AFP via Getty Images hide caption
Hurricane Isaias made landfall near Ocean Isle Beach, N.C., near the border with South Carolina. Pictured are people walking through floodwaters in Myrtle Beach, S.C. Sean Rayford/Getty Images hide caption
The United Nations Intergovernmental Panel on Climate Change met in Incheon, South Korea, in October 2018. The pandemic has forced scientists around the world to write the latest U.N. climate report without meeting in person. Jung Yeon-Je /AFP via Getty Images hide caption
The health threat posed by the coronavirus pandemic is particularly intense for people with cancer. Medication weakens the immune system. Cancer treatments are often delayed. FG Trade/Getty Images hide caption
The SpaceX capsule sits aboard a recovery ship in the Gulf of Mexico. NASA/Screenshot by NPR hide caption
A bottle containing orange juice and rice cooking wine is set as a trap by Jenni Cena, pest biologist and trapping supervisor from the Washington State Department of Agriculture, in an effort to catch Asian giant hornets, also known as murder hornets. Karen Ducey/Getty Images hide caption
NASA astronauts (from left) Bob Behnken, Doug Hurley and Chris Cassidy are the U.S. members of the Expedition 63 crew aboard the International Space Station. Behnken and Hurley are scheduled to return to Earth on Aug. 2. NASA hide caption
Andrew Stuart wears a bandana as a mask while taking a selfie with his dog, Voltron, on Sunset Blvd, Thursday, July 2, 2020, in West Hollywood, Calif. Ashley Landis/AP hide caption
Coronavirus Questions Answered, Plus A Chat About 'Indian Matchmaking'
Director of the National Institutes of Health, Dr. Francis Collins, holds a model of the coronavirus. This is the sixth vaccine candidate to join Operation Warp Speed's portfolio, and the largest vaccine deal to date. Saul Loeb/Pool/AFP via Getty Images hide caption
A man runs with his dog while at Brooklyn Bridge Park. If you're greeting other doggos, do it from a distance. Al Bello/Getty Images hide caption
A healthcare worker zips up a protective barrier in the Covid-19 Unit at United Memorial Medical Center in Houston on July 2. Mark Felix/AFP via Getty Images hide caption
A scientist is pictured working during a visit by Britain's Prince William, Duke of Cambridge (unseen), to Oxford Vaccine Group's laboratory facility at the Churchill Hospital in Oxford, west of London on June 24, 2020, on his visit to learn more about the group's work to establish a viable vaccine against coronavirus COVID-19. STEVE PARSONS/POOL/AFP via Getty Images hide caption
Air pollution is a persistent problem in California's Central Valley. A new study finds that the places that were most polluted nearly 40 years ago generally remain the most polluted today. David McNew/Getty Images hide caption