Meteorological summer began on Sept. 1, but astronomical autumn is Sept. 22 at 8:44 a.m., what we call the autumnal equinox.

The Earth is getting a second 'mini-moon' later this month, but it'll only last from Sept. 29 to Nov. 25, researchers say.

On Sept. 22, the fall equinox formally heralds in autumn and marks the end of summer in the Northern Hemisphere.

Iron carried in clouds of Saharan dust blown across the Atlantic Ocean is increasingly available to tiny life forms the further it travels.

We spoke with four designers to get their pro decorating tips for curating your own fall fantasy that doesn’t look like the ...