Scientists identify secret ingredient in Leonardo da Vinci paintings

"Old Masters" such as Leonardo da Vinci, Sandro Botticelli and Rembrandt may have used proteins, especially egg yolk, in their oil paintings, according to a new study.

The surreal facades of America's strip clubs

Some people travel the world in search of adventure, while others seek out natural wonders, cultural landmarks or culinary experiences. But French photographer François Prost was …

Nelly Cheboi, who creates computer labs for Kenyan schoolchildren, is CNN's Hero of the Year

Celebrities and musicians are coming together tonight to honor everyday people making the world a better place.

CNN Heroes: Sharing the Spotlight

These were the best and worst places for air quality in 2021, new report shows

Air pollution spiked to unhealthy levels around the world in 2021, according to a new report.

Not only is Lake Powell's water level plummeting because of drought, its total capacity is shrinking, too

Lake Powell, the second-largest human-made reservoir in the US, has lost nearly 7% of its potential storage capacity since 1963, when Glen Canyon Dam was built, a new report shows.

Big-box stores could help slash emissions and save millions by putting solar panels on roofs. Why aren't more of them doing it?

As the US attempts to wean itself off its heavy reliance on fossil fuels and shift to cleaner energy sources, many experts are eyeing a promising solution: your neighborhood big-b…

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Donate now to a Top 10 CNN Hero

Anderson Cooper explains how you can easily donate to any of the 2021 Top 10 CNN Heroes.