This photo, provided by the Wildlife Conservation Society, shows a Matschie's tree kangaroo joey that made its first appearance from its mother's pouch at New York's Bronx Zoo, last Thursday. The joey, born at the end of December, is the second of its species born at the Bronx Zoo and to this female since 2021. Terria Clay/Wildlife Conservation Society/AP hide caption
Study participant Freddie sits next to a jar with an odor sample, then approaches a bowl to check for a treat. University of Bristol hide caption
To celebrate the 25th anniversary of the launch of the Chandra X-ray Observatory, the mission released 25 views of cosmic objects ranging from supernova remnants to galaxy clusters and more. NASA/SAO/CXC hide caption
Glyptodonts were giant, armadillo-like shelled mammals that went extinct about 10,000 years ago. A study reveals that cut marks on a glyptodont fossil in South America could have been made by humans a little over 20,000 years ago. Daniel Eskridge/Stocktrek Images/Science Source hide caption
Gemini IV spacewalk, June 3, 1965. NASA astronaut Ed White became the first American to walk in space. NASA hide caption
Paul Watson, then founder and President of the animal rights and environmental Sea Shepherd Conservation, attends a demonstration against the Costa Rican government near Germany's presidential residence during a visit of Costa Rica's president in Berlin in May 2012. Greenland police said they arrested Watson on Sunday on an international arrest warrant issued by Japan. Markus Schreiber/AP hide caption
New insights into the brain's waste-removal system could one day help researchers better understand and prevent many brain disorders. Mihaela Rosu/Getty Images hide caption
This northern ghost bat (Diclidurus albus) was a special, rare find for the bat scientists gathered in Belize. “It was magical,” says evolutionary biologist Jasmin Camacho.
Luis Echeverría for NPR
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An artist impression of Fona herzogae. Jorge Gonzalez hide caption
Ice melting from Greenland and the polar regions is causing sea levels to rise, shifting mass around the planet in a way that's starting to slow its spin, scientists are finding. NASA hide caption
Once completed, India's National River Linking Project will transfer an estimated 200 billion cubic meters of water around the country each year. STRDEL / Stringer/Getty Images hide caption
In 2022, a large, unexpected rogue wave struck the Viking Polaris, breaking windows. One passenger died and others were injured. Alexis Delisi/AFP/Getty Images hide caption
Fisherman Alan Belucci inspects dead fish on the banks of the Piracicaba River in a rural area of Piracicaba, Sao Paulo state, Brazil, on Wednesday. The state's environmental agency alleges that the cause of their death is irregular dumping of industrial waste into the river. Andre Penner/AP hide caption
Royal Ramey, co-founder and CEO of the Forestry and Fire Recruitment Program. Ed Kashi/Talking Eyes Media hide caption
Crows can be trained to count out loud much in the way that human toddlers do, a study finds. Andreas Nieder/Universal Images Group Editorial hide caption
A study finds that psilocybin can desynchronize networks in the brain, potentially enhancing its plasticity. Sara Moser/Washington University School of Medicine in St. Louis hide caption
Synchronous fireflies, known as Photuris frontalis, blink in the woods near the Congaree River on Wednesday, May 15, 2024, in Columbia, S.C. Sam Wolfe for NPR hide caption
Firefighters work against the advancing Lake Fire in Los Olivos, Calif., on Saturday, July 6, 2024. Eric Thayer/AP hide caption
NASA's Wide Field Infrared Survey Telescope is set to launch in 2027. This innovative telescope is designed to investigate long-standing astronomical mysteries, such as dark energy, the force behind the universe's expansion. NASA hide caption
Launched in 1990, a major goal of the Human Genome Project was to sequence the human genome as fully as possible. In 2003, project scientists unveiled a genome sequence that accounted for over 90% of the human genome — as complete as possible for the technology of the time. Darryl Leja, NHGRI/Flickr hide caption
Peter Nyongesa walks through the mangroves to monitor his beehives in the Bangladesh slums in Mombasa, Kenya, on May 30, 2024. The 69-year-old Nyongesa recalled how he would plead unsuccessfully with loggers to spare the mangroves or cut only the mature ones while leaving the younger ones intact. So he has turned to deterring the loggers with bees, hidden in the mangroves and ready to sting. Gideon Maundu/AP hide caption