Rocks older than 4.03 billion years could shed light on Earth's earliest geological history, but they're incredibly rare.

Scientists have identified what could be the oldest rocks on Earth from a rock formation in Canada. The Nuvvuagittuq Greenstone Belt in Quebec has long been known for its ancient rocks, but researchers disagree on exactly how old they are.

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.