4 ms·

Fascinating! If you've got a source for the oxygen isotope variation, I'd love to read it.

• carapace 8y ago
  Sadly, I do not, it's something our teacher told us during a Permaculture Certification course. I suppose it could be bunk... :-( Funny story, I immediately piped up and asked him how the trees did it and he just kind of shrugged it off. I scanned around the room and only one other person was also looking around. Our eyes met and we realized we were the only ones in the room that knew the difference between chemistry and, uh, nuclear stuff. We talked about it after during a break and yeah, we were both pretty perplexed by the scientific ignorance. So yeah, I have to admit I don't know if it's true. And if it is, I assume there's some sort of difference in the isotope ratios of oxygen in the oceans vs. ground water or something like that.