But few are fortunate enough to see Kelvin-Helmholtz clouds, which look like a pattern of ocean waves in the sky. Kelvin-Helmholtz clouds, also known as fluctus clouds, is a rare phenomenon that's ...

If Earth had no atmosphere like the Moon there would be no scattering, and the sky would remain black, even in daylight ...

The sky appears blue because shorter blue light waves scatter more than other colors when sunlight hits the atmosphere. Tap to read in detail.

But our ocean’s health is in danger. How can the blue economy help restore and protect this vital planetary resource? Ahead of the 2022 UN Ocean Conference this June, we spoke with UN DESA’s ...