Artist Clare Hewitt uses fallen oak leaves and sunlight to create her works of art before returning the leaves to the forest ...

Galls on oak leaves are harmless growths caused by specific insects. They have different shapes depending on the insect species causing the gall.

Agriculture officials in Marin County are alerting property owners and arborists to be on the lookout for a tiny invasive ...

An ancient oak tree in northern Greece is believed to be among the oldest surviving tree of its kind in Europe.