Heavy metal-eating "superworms" unearthed in UK

Newly evolved "superworms" that feast on toxic waste could help cleanse polluted industrial land, a new study says.
These hardcore heavy metal fans, unearthed at disused mining sites in England and Wales, devour lead, zinc, arsenic, and copper.

The earthworms excrete a slightly different version of the metals, making them easier for plants to suck up. Harvesting the plants would leave cleaner soil behind.

Full story on National Geographic