My husband and I were observing from a tucked away spot at Capitol Reef NP (we were going to go to Panorama Point, but boy was it crowded! good to see lots of eclipse watchers, though). I also noticed the moon was particularly dark. Even with basically no light pollution, I had to use averted vision to see much detail on the face of the moon during much of totality, and even then I could barely make out the maria. We pondered this quite a bit along with the placement on the moon's limb of both the last and first light. The 'extreme' darkening makes it seem like the middle of Earth's shadow must have passed over the moon, but the fact that the last light was at lower right and first at lower right indicates it was more the bottom of Earth's shadow. Maybe it's just that the other lunar eclipses I've seen weren't as total as this one, but I agree it really darkened the moon a lot! Anyone know why? k