The International Space Station will stay in orbit for at least four years after 2020, NASA said.
Russians sorting raw hemp fibers in the Kursk region in the 1960s. Hemp has been used as building material for millennia in Europe and elsewhere, but it’s only just starting to get wider recognition as a green construction option.
Workers at Kruger National Park in South Africa moving a rhino from a high-risk poaching area in 2014. Researchers in South Africa are turning to genetic fingerprinting to track down poachers for prosecution.
The ladder-shaped painting on the left in the La Pasiega cave in Spain is older than 64,000 years, scientists have found, and was made by Neanderthals.
A Spirit of Charity: Restoring the Bond Between America and Its Public Hospitals. By Mike King. Secant. 352 pages. $26.95.
An 18th-century ship was discovered last month in Old Town Alexandria, Va., the fourth discovered in recent years within a two-block radius.
A laser beam shot from one of four telescope units of the European Southern Observatory's Very Large Telescope, one of the largest in the world. New telescopes such as the Thirty Meter Telescope and the Extremely Large Telescope would dwarf it — if they're completed.
Fossils of extinct squidlike creatures called ammonites located in a rock layer very close to the boundary between the Permian and Triassic periods.
A 10,000-year-old dog from an archaeological site near Eldred, Ill., known as the Koster site, where the earliest known dogs in the Americas were found.
Lee Se-dol, a professional Go player from South Korea, was smiling amid other players despite losing four of five games against a Google computer program called AlphaGo.
Carl Hart, an associate professor at Columbia University, is the author of the book “High Price,” a mix of memoir and scientific research about drug addiction.
A Chinese giant salamander, in a glass enclosure in Zhangjiajie, China. There are as many as eight distinct species, but farming is muddling them into a single hybridized population.
Caribou from the Dolphin and Union population during a crossing to the Canadian mainland.
A field technician excavating the remains of an amputated limb at Manassas National Battlefield Park in October 2015. The discovery of two nearly complete sets of soldiers’ remains, 11 partial limbs and other artifacts appeared to date to the Second Battle of Bull Run, which ended Aug. 30, 1862.
Earth’s gravitational interactions with other planets — particularly Venus, because it is very near — affect the shape of its orbit.
A promotional composite image from Knightscope showing the K5 Autonomous Data Machine.
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