- and may affect the nervous systems of other animals and even humans, study warns

The health effects of the world's most popular herbicide Roundup on humans and animals have long been debated.

Now, new research has linked low levels of glyphosate - the weed killing component - to convulsions in soil-dwelling roundworms for the first time.

Scientists from Florida Atlantic University exposed Caenorhabditis elegans to the US and UK formulations of Roundup, as well as glyphosate by itself.