The document provides information about the cork oak tree (Quercus suber), including its characteristics, uses of cork harvested from its bark, and where it is commonly found. Specifically, the cork oak is an evergreen oak native to southwest Europe and northwest Africa. Its thick, corky bark can be harvested every 10-12 years without harming the tree and regenerates. Cork is used commonly for bottle stoppers and in various other applications. Cork oak forests are widespread in Mediterranean countries like Spain.