Christopher JoyceChristopher Joyce is a correspondent on the science desk at NPR. His stories can be heard on all of NPR's news programs, including NPR's Morning Edition, All Things Considered, and Weekend Edition.
Karin Bruwelheide handles an amputates limb that dates back to the Civil War. The bones were discovered by scientists at Manassas National Battlefield Park in Virginia. Scientists at the Smithsonian Institution's National Museum of Natural History have been analyzing the bones to learn more about them and who they may have belonged to.
The Gravity Recovery and Climate Experiment Follow-On (GRACE-FO) mission, shown in an artist's rendering, will measure tiny fluctuations in Earth's gravitational field to show how water moves around the planet.
An infrared satellite image shows Hurricane Harvey just prior to making landfall on Aug. 25, 2017. Warm water in the Gulf of Mexico fed heavy rains, according to new research.
An illustration from 1870 shows Prehistoric men using wooden clubs and stone axe to fend off an attacks by a large cave bear. The cave bear (Ursus spelaeus) was a species of bear that lived in Europe during the Pleistocene and became extinct at the beginning of the Last Glacial Maximum, about 27,500 years ago. Mammoths can be seen in the background.
British Library/Science Source
A new satellite, called MethaneSAT,will track methane emissions from oil and gas fields, as well as agriculture and natural sources. It's due for launch in three years.
Environmental Defense Fund
A prep cook at a San Francisco restaurant drops fish skin into a food scrap recycling container. Turning food waste into fertilizer is popular in parts of Europe and is catching on in the U.S. But tiny plastics are also making their way into that fertilizer — and into the food chain.
Justin Sullivan/Getty Images
Flooding in Boston's North End during a nor'easter storm on Friday. A new government report suggests floods will become more common over the next century.
David L. Ryan/Boston Globe via Getty Images