Nature & Environment
Environment: understanding atmospheric and ocean flows
...work. When we bring the cores back from Antarctica or from the Arctic, we actually cut and subsample the ice here. So what I've got over here is actually one of the cores that we've drilled. And this is from a particularly deep core that we retrieved. And this is actually the bottom core. And we estimate that the age down at the bottom is 140,000 years. TAMSIN EDWARDS: So...