[kanaloa]

NOAA RESEARCHERS TRAVEL BACK MORE THAN THREE CENTURIES TO
LOOK AT EARTH

[phileysmiley]

This is fascinating. It is a good beginning. When I was studying geology, core samples were used to study solid objects like ancient plant spores or ash layers. This analysis of trapped gas will, hopefully, lead to a much better understanding of the role human activity has played in climate change.

[kanaloa]

It always has amazed me what they can tell by a air bubble like that.