Rocks from the Hadean Eon, the first period in the geological timescale, have been dated in Québec. These are some of the ...

Geologists have long debated whether a stony formation in Canada contains the world’s oldest rocks – new measurements make a ...

Our planet has been asteroid-smashed, melted and eroded, enough that most of its original armor has been long buried. Except ...

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

In 2008 scientists reported that rocks in Canada were the world’s oldest. New data appear to confirm this contested claim ...

If the new age of these Canadian rocks is solid, they would be the first and only ones known to have survived Earth’s earliest, tumultuous time.

In 2008, researchers reported that these rocks dated back 4.3 billion years 2, a claim that other scientists contested. Work ...

The gold standard for determining the age of ancient rocks is measuring the radioactive decay of isotopes of uranium into lead in minerals known as zircons. But not all rocks contain zircons, so ...

Discover how scientists found and dated the oldest rocks on the planet, and why studying them can help explain how life on ...

Scientists agreed the rocky outcrops in a remote part of Quebec, Canada, were ancient. But were they really Earth’s oldest?