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Tourists, tribes and others in the Grand Canyon region must rely on groundwater for drinking water.

Researchers Spelunk The Grand Canyon To Document Its Beautiful, Confounding Springs

Understanding the springs is important because about a quarter of the world’s population relies on water that comes from karst systems.

A liquor store and massage parlor are seen here in the Midway District, Oct. 16, 2020.

Measure E Seeks Midway District's Revitalization By Raising Building Height Limit

The measure would be the biggest change to San Diego's 30-foot coastal height limit since it was approved by voters in 1972.

Area in Valley Center where Lilac Hills Ranch project is planned, Aug. 30, 2016.

Voters Appear To Narrowly Defeat County's Land-Use Measure A

Measure A would have required public approval of some housing developments in unincorporated areas.

Ishana Kumar, 12, a 7th grader from Chappaqua, N.Y., on Wednesday won a top science award for a project on perception of imaginary colors.

Ishana Kumar, 12, Wins Top Award For Research Into 'Imaginary Colors'

There is a winner in one of the country's biggest middle school science competitions: the Broadcom MASTERS. Ishana Kumar looked into how retinal fatigue may play a role in seeing "imaginary colors."

A general view of the U.S. Embassy in Kabul in 2013. The State Department announced Tuesday "the departure from U.S. Embassy Kabul of U.S. government employees whose functions can be performed elsewhere."

State Department Orders Departure Of Nonessential Personnel From Kabul Embassy

The order came Tuesday, amid concerns about heightened violence as U.S. and NATO troops depart Afghanistan. U.S. officials would not confirm the number of those leaving but insisted it would be small.

Power, Protest And Paranoia

The links between hip-hop and the prison system are on display in laws and lyrics stretching back decades. If you're caught between these two American institutions, it might look like a trap.

Mark Zuckerberg, CEO of Facebook, speaks virtually during a House Energy and Commerce subcommittee hearing in March.

Facebook Calls Links To Depression Inconclusive. These Researchers Disagree

The company has reached out to a number of researchers in recent months, though those same researchers are skeptical about the company's motivations.

A Pakistani shopkeeper cleans toilets on display inside his shop in Lahore.

Half The World Lacks Proper Sanitation. Is It Possible To 'Transform The Toilet'?

In Pipe Dreams, Chelsea Wald examines the health issues related to sanitation and looks at global efforts to manage human waste, including turning it into fuel and fertilizer.

TEHRAN, Feb. 21: Director General of the International Atomic Energy Agency (IAEA) Rafael Mariano Grossi meets Iranian Foreign Minister Mohammad Javad Zarif.

Iran, U.N. Regulators Agree On Reduced — But Continued — Nuclear Verification

The International Atomic Energy Agency and Iran announced an deal to keep some verification activities going for the immediate future. Iran earlier had said it would suspend snap inspections.

Protesters say Amazon and other companies are benefiting from surging demand during the pandemic, but not doing enough to protect essential workers.

'We're Out There' So Protect Us, Protesting Workers Tell Amazon, Target, Instacart

Workers at Amazon, Target and other companies walked off the job on Friday to demand safer working conditions and transparency about how many front-line workers have gotten sick during the pandemic.

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