The oldest continents in the Milky Way may be 5 billion years older than Earth's

 "Several exoplanets at the edge of our galaxy could have formed continents — and advanced life — 5 billion years earlier than Earth, new research suggests."

For more details:

https://www.livescience.com/space/exoplanets/the-oldest-continents-in-the-milky-way-may-be-5-billion-years-older-than-earths