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Science video

Sunset behind an ancient Mayan pyramid with stairs leading up.
Science video

The Mayan Empire Rediscovered – COFL

The disappearance of the Mayan Empire is all the more mysterious because it happened not once, but twice. The earliest civilization that took root during the heart of antiquity prospered for hundreds upon hundreds of years, with innovations that rivaled those of Egypt.

Two men, one wearing a mask, the other with a nasal tube, in a hospital setting.
Science video

First Transplant of a Pig Heart into a Human

“This was a breakthrough surgery and brings us one step closer to solving the organ shortage crisis. There are not enough donor human hearts available to meet the long list of potential recipients,” said Bartley P. Griffith, MD, who transplanted the pig heart into patient David Bennett.

Unique umbrella-shaped dragon blood trees under a bright blue sky.
Science video

The Power of Trees – COFL

Trees curb climate change directly by removing carbon dioxide from the atmosphere. Through the process of photosynthesis, forests offset 10 to 20 percent of the country’s greenhouse gas emissions each year. Additionally, trees help protect against climate impacts such as flooding,

People watching the sunset over a city skyline across a river.
Science video

Climate Change – We Live Here Together

The World is Watching Cities, Now More than Ever
COP21 brought cities into the spotlight. C40 is proud to help shine that light a little brighter. Because cities and mayors are acting now, and we’re right beside them as they become necessary leaders in this vital cause.Watch the mayors of Bogotá, C

A vibrant, colorful arc resembling a rainbow against a blue background.
Science video

Rainbow Clouds – COFL

A rainbow cloud can occur because of something called cloud iridescence. It usually happens in altocumulus, cirrocumulus, lenticular and cirrus clouds. Iridescent clouds happen because of diffraction – a phenomenon that occurs when small water droplets or small ice crystals scatter the sun’s light.

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