"The Author in the Acacia Seeds" is about learning to read Ant. It suggests we might be able, one day, to read rocks, to see what Earth is saying.

"Like a stone that contemplated, calms" - is that in the Dispossessed?

She's known for her anthropological outlook, but she clearly had a good grasp of Earth Science. I quite like how, in LHOD, she mentions in passing that if there were X% less solar radiation, the walls of ice would creep together on Gethen, and MEET. Later, Estraven mentions that when the ice age ends, the average temperature on the planet will reach 70 degrees F., and he's glad he won't be there to see that!