The analysis dated the site's streaky gray rocks, part of an outcrop called the Nuvvuagittuq Greenstone Belt, to 4.16 billion years ago — meaning they're remnants from our 4.57 billion-year-old planet ...

Radioactive materials are found naturally in the Earth. But even so, saying an area is radioactive can conjure up images of things in a science fiction film – green glowing men, deformed animals. In ...