With no help from the federal government, states are trying to regulate recreational marijuana. California's Department of ...

Parthenium hysterophorus (Family: Asteraceae), locally called gajar ghas or Congress grass, is an alien weed which entered into India along with wheat imported from USA in the early 1950s.

Following is a transcript of the video. This isn’t some alien planet It’s cannabis! These images were taken with a scanning electron microscope. It’s not your ordinary microscope.

IWAKI, Fukushima Prefecture—A weed described as “the worst alien species on the planet” has been discovered for the first time in the northeastern Tohoku region, alarming local farmers and ...