2 ms·
Umm, yes, they do. They know what layer of rock it was found in and can uranium date the surrounding rocks.
by bluedevil2k 7y ago
Umm, yes, they do. They know what layer of rock it was found in and can uranium date the surrounding rocks.
- twodave 7y agoThey might, perhaps, be able to date how long it's spent on the Earth, while making wild assumptions about pre-historic conditions that we (by definition) weren't around to observe.
- strbean 7y agoI took it as "really, a rock that is old?!" rather than "they can't know that". But I might have misunderstood.