Reading on NPR this evening:

How A-Bomb Testing Changed Our Trees

Back in the 1950s, the Americans, the British, the French and the Russians tried to impress each other by “testing” atomic weapons. This involved blowing up multi-megaton bombs in the air in remote places, but the explosions didn’t stay local.

This is an interesting tale of Carbon-14 created by our “activity”. Carbon-14 in the trees, Carbon-14 in Human DNA. This is allowing the study of cell life, etc..

I am not sure where to take this other than to tell you all about it!