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Think you can get away with fewer than eight hours of sleep per night? Neuroscientist Matthew Walker says, think again. Sophie Blackall/Getty Images/Ikon Images hide caption
Walter Mischel, a psychologist who devised the marshmallow test, explained what it really means. Marcie LaCerte/NPR hide caption
Drinking water samples from homes in southwestern Puerto Rico are tested at Interamerican University of Puerto Rico in San German. Rebecca Hersher/NPR hide caption
Puerto Rico's Tap Water Often Goes Untested, Raising Fears About Lead Contamination
Immature human eggs (pink) were created by Japanese researchers using stem cells that were derived from blood cells. Courtesy of Saitou Lab hide caption
The fix was in for this rhesus macaque drinking juice on the Ganges River in Rishikesh, Uttarakhand, India. No gambling was required to get the reward. Fotofeeling/Getty Images/Westend61 RM hide caption
In Lab Turned Casino, Gambling Monkeys Help Scientists Find Risk-Taking Brain Area
Friend or foe? A California two-spot octopus (Octopus bimaculoides) gives observers the eye at the Marine Biological Laboratory in Woods Hole, Mass. Tom Kleindinst/Marine Biological Laboratory hide caption
Kenya Wildlife Service (KWS) rangers display ivory seized from poachers around the country. KWS has played a critical role in carrying out operations against poachers. Simon Maina/Getty Images hide caption
The Sohae Satellite Launching Station was the site of North Korea's first successful space launch in 2012. The North now says it will dismantle the facility. David Guttenfelder/AP hide caption
A Swiss study tracking the health of a group of children conceived via assisted reproductive technology found that a surprising number developed premature aging of their blood vessels. Now in their teens, 15 percent have hypertension. Steve Debenport/Getty Images hide caption
A World Food Programme convoy carries humanitarian aid to Aleppo, Syria. Getting food into conflict zones is a major hurdle — and a topic of discussion at the WFP's Innovation Accelerator. Cem Genco/Anadolu Agency/Getty Images hide caption
Protesters disrupt construction of the Bayou Bridge Pipeline in early September. Trespassing near pipelines is now a felony offense in Louisiana, punishable by up to five years in prison. Travis Lux/WWNO hide caption
Tougher Laws On Pipeline Protests Face Test In Louisiana
WWNO - New Orleans Public Radio
A gas flare at a natural gas processing facility near Williston, N.D. The Trump administration wants to ease regulations on methane emissions from energy production on public lands. Matthew Brown/AP hide caption