Gray rocks uncovered in northern Nunavik, Quebec, Canada may be the ultimate primordial find. The stones date back 4.16 billion years to the Hadean era and are the oldest known rocks on the planet. They are described in a study published June 26 in the journal Science .

Canadian scientists found the oldest known rocks on Earth - dating back 4.16 billion years - shedding light on our planet’s earliest history.

Canadian researchers said they'd found the world's oldest rocks in northern Quebec. The find was controversial. But after more than a decade of hard work, they believe they've really proven it and are giving scientists a new glimpse into Earth's early history.