Dramatic before-and-after photos of Lake Mead are providing visual evidence to the alarming rate in which the water levels at the largest reservoir in the country are receding.

Twenty-nine states are under excessive heat warnings today as the Southwest suffers through record drought. ABC News’ Christie Ileto has the latest.

The lake, which provides 40 million Americans with water, has reached its lowest levels since the lake was created in the 1930s and has been exacerbated due to climate change.

UNLV physicist Qiang Zhu’s efforts to accelerate new materials discovery is getting a jumpstart with $1.3 million in grant funding from the National Science Foundation (NSF) and the U.S. Department of Energy (DOE). His work employs advanced computations to theorize the design and application of new materials.

When someone asks UNLV astrophysicist Jason Steffen why regular people — or at least people who don’t study the sky in intricate detail — should be interested in the images coming back from the James Webb Space Telescope, he asks them what they value before he responds.

An unusual blast of radio waves from deep space had a sense of rhythm. Over the few seconds in December 2019 when the burst was detected, it kept a steady beat. That tempo holds clues to the potential origin of the mysterious outburst, one of a class of flares called fast radio bursts.

An unusual blast of radio waves from deep space had a sense of rhythm. Over the few seconds in December 2019 when the burst was detected, it kept a steady beat. That tempo holds clues to the potential origin of the mysterious outburst, one of a class of flares called fast radio bursts.

UNLV professor of physics and astronomy Jason Steffen is available to talk about the significance of the James Webb Space Telescope imagery, and how it broadens our understanding of the universe.

Despite all the incessant coverage about air travel, pre-pandemic polling showed that a majority of Americans don't fly every year. Now, even fewer people fly.

Who doesn’t love a good vacation? But the likelihood of stress goes through the roof as soon as you factor in the act of traveling. Annoyances like cramped leg room, high gas prices and mysterious service fees can make getting from point A to point B, a real pain. Is there a more efficient way to drive, board a plane or even fuel your vehicle? Harry turns to some very smart people who are doing their best to optimize the way we travel. You'll hear about how AI can create the most efficient road trip and the science behind boarding an airplane faster. And will kelp power the transportation of the future?

There are much faster methods for onboarding than the current procedures.

Making the most of already mined elements can help meet future demand while reducing carbon emissions