A leopard frog catches a cricket using its sticky tongue. Courtesy of A. Noel and D.L. Hu/Georgia Institute of Technology hide caption
Science
Tuesday
Satellite imagery of Machu Pichu in Peru, taken in June 2016. DigitalGlobal2017 hide caption
Monday
For years, the satellites that make up America's Global Position System have been carrying sensors that measure the weather in space. This image illustrates the orbital planes in which GPS satellites travel around Earth. Courtesy of Los Alamos National Laboratory hide caption
An artist's impression of Saccorhytus coronarius, a sea creature that lived 540 million years ago. Jian Han, Northwest University, China hide caption
Scientists Describe Ancient Bag-Like Sea Creatures From China
Washu chocolate is made from cacao arriba, a sought-after variety of cacao harvested in Ecuador. Ryan Eskalis/NPR hide caption
Sunday
Biologist Shaun Clements counts down the seconds before emptying a vial of synthetic DNA into a stream near Alsea, Oregon. Jes Burns/Oregon Public Broadcasting/EarthFix hide caption
The micromotor device may someday be used to deliver antibiotics to the stomach. Angewandte Chemie International Edition hide caption
This Tiny Submarine Cruises Inside A Stomach To Deliver Drugs
Saturday
Medicaid doesn't just provide health care for the poor; it also pays for long-term care for a lot of older people, including the majority of nursing home residents. Repealing the ACA could change the way Medicaid programs are funded. Bill Gallery/Doctor Stock/Science Faction/Getty Images hide caption
Obamacare Repeal Could Threaten Provisions That Help Older Adults
Friday
Multiple Twitter accounts claiming to be run by members of the National Park Service and other U.S. agencies have appeared since the Trump administration's apparent gag order. The account owners are choosing to remain anonymous. David Calvert/Getty Images hide caption
Firefighters work to put out a forest fire in Constitucion, Chile, on Thursday. Martin Bernetti/AFP/Getty Images hide caption
Thursday
Apollo 1 astronauts Ed White (from left), Gus Grissom and Roger Chaffee, 1967. The astronauts died as a result of a fire in the cockpit during a training session on Jan. 27, 1967. Keystone/Hulton Archive/Getty Images hide caption
50 Years Later, NASA Creates Tribute To 3 Astronauts Who Died In Space Race
Cells derived from rat pluripotent stem cells were enriched in the developing heart of a genetically modified mouse embryo. Cell hide caption
A self-portrait taken by Cajal in his library when he was in his 30s. Courtesy Instituto Cajal del Consjo Superior de Investigaciones Científicas, Madrid hide caption
Art Exhibition Celebrates Drawings By The Founder Of Modern Neuroscience
Government scientists are working on a climate assessment that among other things will help predict "sunny day" floods like this one in Miami Beach, Fla., in 2015. Joe Raedle/Getty Images hide caption
Huge Federal Climate Enterprise At Stake As Trump Team Moves In
All of California is now free of "exceptional drought" status, but pockets of extreme or severe drought remain in the south, as seen in this image from the U.S. Drought Monitor. U.S. Drought Monitor hide caption