Photosynthesis changed Earth in powerful ways. When photosynthetic organisms appeared, it led to the Great Oxygenation Event.

Squill are lesser-known spring bloomers, but these delicate white, blue or blue-and-white striped flowers are delightful.

Acorns, black walnuts and chestnuts are now falling on forest floors, yards, parking lots and sidewalks across Virginia. Left alone, many will never grow into trees, especially in urban areas.

Now more schools are tearing out hot asphalt or turf or rubber mats in favor of green schoolyards, which can include grass, gardens, mulch and trees. Between 2022 and 2023, California alone ...

Now more schools are tearing out hot asphalt or turf or rubber mats in favor of green schoolyards, which can include grass, gardens, mulch and trees. Between 2022 and 2023, California alone granted ...

Ylenia Aguilar raised her two sons in Arizona — first in Tucson and later Phoenix, so they’re no strangers to scorching heat. Just recently, Phoenix hit its 100th straight day at or above 100 ...