An expert at the Scripps Institution of Oceanography explains the weather phenomenon that can wreak havoc across California.

The Pineapple Express is an atmospheric river in the sky that comes ... huge amounts of water and can cause deadly mudslides. Since wildfires kill roots that hold much of the earth in the region ...

The exoplanet, known as GJ 1214 b, was detected by the Hubble Space Telescope and dubbed a "waterworld" by the science ...