There’s an invasive species now found in Washington state: the hammerhead flatworm. They are land-dwelling and they can grow up to 22 inches long. They kill earthworms necessary for everything from ...

Maine State Horticulturist Gary Fish says the worms likely arrived hidden in soil, possibly through imported plants. They have long, ribbon-like bodies, a distinctive spade-shaped head, and produce a ...

After an injury, some flatworms can regrow almost every cell in their bodies, axolotls can rebuild entire limbs and parts of their brain, zebrafish can mend broken spinal cords and green anole ...