"Don't kill it, don't squish it, don't cut it up," Texas Agriculture Commissioner Sid Miller warned residents via NBC as a toxic flatworm spreads across North Texas. While this invasive species has been in the US for years, the state's fatally heavy rains, fueled by climate change, are enabling the hammerhead flatworm (Bipalium kewense) to thrive and spread. This brown and black-striped, flattened land planarian with a distinctive half-moon-shaped head can reach lengths of up to 40 cm (15.7 inches). Like many flatworm species, it can regenerate a whole new worm from slices of itself. Decapitating the worm will only...