2 ms·
Aren't the oldest fossils we know of assumed to be something like 500 million years old? Or you could try leaving particular "signatures" of radioactive elemen
by red_admiral 2y ago
Aren't the oldest fossils we know of assumed to be something like 500 million years old?
Or you could try leaving particular "signatures" of radioactive elements. Not ones with a short half-life, obviously, but xenon-124 lasts pretty long, tellurium-128 will survive anything except the heat death of the universe, and there's a few others like that.
- yencabulator 2y agoSure, how many >300 million year old fossils have we found related to how many animals lived at that time, over that span of time? The problem is many methods might work -- literally you accidentally falling on a trip to Florida might work -- but the probability can be very low.