Spring officially begins today (March 20) with the vernal equinox, bringing longer days and warmer temperatures to the Northern Hemisphere. The vernal equinox signals the astronomical start of ...

Thursday is the first day of spring, or the vernal equinox, in the Northern Hemisphere. During an equinox, the center of the sun is on the same plane as the equator. After the vernal equinox in ...

H eat waves have gotten hotter in the Northern Hemisphere in recent decades. Home to about 90% of the world's population, ...

You can tell spring has officially begun in the Northern Hemisphere just by looking at the stars. Here's how to easily spot the Spring Triangle without a telescope.