No one of these questions by itself is worth starting a thread over. But maybe collectively they amount to a modest-sized hill of beans... 1. I knew someone who claimed that the expression "fell and broke her hip" is putting it backward. He said an elderly person who is walking suffers a sudden fracture at the hip joint, and the resulting inability to support the body properly on just the one remaining good leg topples the person onto the floor. Is he onto something? 2. Some vegetarians give the impression that vegetables are a guilt-free source of food. But I know a person who says that is certainly not the case, and he points to nuts and avocadoes as examples of foods that are high in fats and that can make you obese. True? 3. Sometimes when I am lying in bed, almost asleep, one of my legs will suddenly bend at the knee and jerk upward. Somewhere I read that this is a leftover reflex from when our ancestors were tree dwellers, and they needed to be able to react almost instantly when slipping off of a tree branch at night as they slept. Is this plausible? 4. Years ago I read a book or an article (don't remember which) that put forward the idea that humans are "aquatic apes." By this, the author meant that more than other primates, our ancestors spent a lot of time in the water. Supposed evidence for this was women's abillty to grow really long hair so that the infant could grasp its mother's hair with its fingers and thereby keep its head above water, and that our body's hair shafts are slanted in such a way that as we swim, the tail end of the hairs are already pointed in the downstream direction, the resulting streamlining allowing us lower muscular effort when we swim. No doubt other evidence was presented as well, but those are the two things I can recall. Has anybody heard of this?