On Sept. 22, the autumnal equinox, which signals the start of fall in the Northern Hemisphere, finally brings an end to our long, hot summer on Monday at 2:19 p.m. EDT. This happens at a precise ...

The equinox occurs at the same moment wherever you are on Earth but what is it and when does it take place? Chris Fawkes has the answers.

The autumnal equinox arrives Monday, marking the start of the fall season for the Northern Hemisphere and the spring in the Southern Hemisphere. On the equator, the sun will be directly overhead at ...

In the US, the flu season starts in October and can go until early spring, with cases peaking in February.

The case puts students in the shoes of Todd Davis, founder and CEO of a boutique brownfield redevelopment firm, Hemisphere Development, in 2010. Davis is wrestling with decisions and processes ...

A 246 million-year-old reptile fossil discovered by scientists in New Zealand has been identified as the oldest marine reptile fossil found in the Southern Hemisphere, according to a Swedish museum.

The winter solstice is Saturday, bringing the shortest day and longest night of the year to the Northern Hemisphere — ideal conditions for holiday lights and warm blankets. For those who would rather ...

A new NASA-backed study—relying on data from the Clouds and the Earth’s Radiant Energy System (CERES) satellite—suggests that ...

As of Monday, Oct. 13, the moon phase is Third Quarter. Tonight, only 53% will be lit up, according to NASA's Daily Moon ...