Auroras are possible over the U.S. tonight (March 25) as a "moderate" geomagnetic storm hits Earth. The Northern Lights could ...

Hundreds of animals, from tiny ants to mighty hippos, are shaping the Earth's surface as powerfully as floods and storms. These animals effectively act as landscape engineers, reorganizing soils and ...

The vernal equinox, which occurs at the start of astronomical spring, is when the sun's rays equally shine on both of the Earth's hemispheres. Thursday marks the vernal equinox, or the first day of ...

Spring officially begins today (March 20) with the vernal equinox, bringing longer days and warmer temperatures to the ...

The difference between an equinox and a solstice is based on Earth’s tilt, affecting daylight length and the changing of ...