@LeviasLife For someone that clever, he is remarkably unaffected and fun.
How wonderful to have teachers of that quality - it must have been brilliant actually being there.
Although we are all fortunate to benefit from the recordings!
@Sci_Nature0 According to Gemini:
The geoid is the shape that the Earth's global ocean surface would take under the influence of Earth's gravity and rotation alone, without winds, tides, or currents