The initiation of rain in clouds without ice remains one of the largest unsolved mysteries in atmospheric science.

Clouds need two essential ingredients to form, and both must be present simultaneously for the process to begin. There are two ingredients needed for clouds to form: water and nuclei. The first ...

Clouds form when water vapor—an invisible gas in the atmosphere—sticks to tiny floating particles, such as dust, and turns into liquid water droplets or ice crystals. In a newly published study, we ...

Add Yahoo as a preferred source to see more of our stories on Google. Noctilucent clouds glow above the horizon after sunset. The rare clouds form nearly 50 miles above Earth's surface in the ...

This week's question comes from Regina, who asks about one of the basic elements of our weather, "Why do clouds form?" Meteorologist Rob Shackelford: This might sound like a weird analogy, but I need ...

See more of our trusted coverage when you search. Prefer Newsweek on Google to see more of our trusted coverage when you search. A video capturing a stunning cloud formation that looks like "the ...

They're only seen in certain places, at a certain time of year and time of night. Here's how these clouds form and what they ...

As part of the international CLOUD project at the nuclear research center CERN, researchers at PSI have identified so-called sesquiterpenes—gaseous hydrocarbons that are released by plants—as being a ...

Melting Arctic sea ice exposes a natural process that dramatically increases cloud-forming particles, with potential effects ...