Things I've learned from this section:
1. Gravity causes things to go down.
2. When anchoring vegetation is removed, shit rolls downhill.
3. Aquitard is a word.
4. Antarctica is bogarting all our fresh water.
5. No, one couldn't say that a glacier is just an iceberg that didn't get the memo.
6. Deserts are very different from more humid places.
7. Desert plants are highly tolerant of drought.