UK Department for International Development

Scientists have developed a way to pull water out of air in arid settings, powered by nothing more than sunlight. This is a big deal for fighting water scarcity, a problem faced by more than half the world, and it matters even more because it can work in impoverished low-humidity environments.

How it works: During the day, sunlight hits porous materials in the device, creating just enough energy to convert water molecules into vapor. The prototype isn't yet ready to be scaled for broad use, but the teams that developed it at MIT and the University of California-Berkeley believe that it shouldn't take long to test it in arid countries around the world.

Sound smart: The device is built on synthetic, porous materials (called metal-organic frameworks) made of molecules held together with metal atoms.

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Ilhan Omar wins Minnesota primary

Photo: Stephen Maturen/Getty Images

Rep. Ilhan Omar (D-Minn.) won the Democratic primary against lawyer Antone Melton-Meaux on Tuesday evening, AP reports.

Why it matters: The race is one that's played out across the U.S. as progressives continue to sweep party nominations. Omar's win officially means all four progressive members of "The Squad" have won their primary elections.

Updated 3 hours ago - Politics & Policy

25 face felony charges after downtown Chicago hit by looters

Police officers inspect a damaged Best Buy in Chicago that was looted and vandalized. Photo: Scott Olson/Getty Images

Local police officers are seeking felony charges in 25 cases following the arrest of 100 people in the wake of widespread looting and property damage in Chicago on Monday, per the Washington Post.

Driving the news: Law enforcement said the event involving hundreds of people was a coordinated response after an officer shot a suspect Sunday evening, according to CBS Chicago.

Marjorie Taylor Greene wins Georgia's 14th district runoff

Photo: Elijah Nouvelage / Getty Images

Gun-rights activist Marjorie Taylor Greene defeated physician John Cowan in a runoff election for the Republican nomination in Georgia's deep-red 14th Congressional District on Tuesday, AP reports.

Why it matters: Greene, a vocal QAnon conspiracy theorist who has been condemned by GOP leaders for making multiple offensive remarks about Black people, Jews and Muslims in Facebook videos, is likely to win a seat in the House come November.