Scientists stunned to find strange ‘alien plant’ that doesn’t belong to any known species - Findings point to lack of clarity ...

The spread of species beyond their native habitat is a human-made environmental change on a global scale. Among vascular plants, over 16,000 species have now permanently settled in foreign countries.

"Star Trek" is home to countless alien species, many of whom offer beloved characters. Some are not. We rank the 10 most ...

As American as Apple Pie: An Introduction to Weeds -- Out of Africa: How Slavery Transformed the American Landscape and Diet -- A Green Nightmare: The Un-American Lawn -- A Sow's Ear from a Silk Purse ...