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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

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Rebecca Hersher/NPR

Puerto Rico's Tap Water Often Goes Untested, Raising Fears About Lead Contamination

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Immature human eggs (pink) were created by Japanese researchers using stem cells that were derived from blood cells. Courtesy of Saitou Lab hide caption

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Courtesy of Saitou Lab

Scientists Create Immature Human Eggs From Stem Cells

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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

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Fotofeeling/Getty Images/Westend61 RM

In Lab Turned Casino, Gambling Monkeys Help Scientists Find Risk-Taking Brain Area

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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

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Tom Kleindinst/Marine Biological Laboratory

Octopuses Get Strangely Cuddly On The Mood Drug Ecstasy

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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

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Simon Maina/Getty Images

DNA Test Helps Conservationists Track Down Ivory Smugglers

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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

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David Guttenfelder/AP

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

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Steve Debenport/Getty Images

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

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Cem Genco/Anadolu Agency/Getty Images

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

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Travis Lux/WWNO

Tougher Laws On Pipeline Protests Face Test In Louisiana

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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

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Matthew Brown/AP