The Smithsonian is presenting a traveling exhibit in 19 libraries across the country, asking What Does It Mean to Be Human? Fortunately, one of them is located nearby, and a friend and I visited it this past week. The primary subject of the exhibit is, of course, human evolution, and timelines illustrating skeletal changes, social gatherings, tool use, art, etc. are abundantly displayed. But I was more interested in just how the scientists have arrived at today’s body of knowledge on the subject. And I was not disappointed; explanations were plentifully supplied. For example: Early African Homo erectus fossils (sometimes called Homo ergaster) are the oldest known early humans to have possessed modern human-like body proportions with relatively elongated legs and shorter arms compared to the size of the torso. These features are considered adaptations to a life lived on the ground, indicating the loss of earlier tree-climbing adaptations, wi...
My alarm clock goes off every morning at eight, except for the few times when I have a breakfast date. Usually I wake up about an hour before that, or at least I partly wake up. It is important that I remain in a “not quite awake but not quite asleep” state, because I consider that time as the germination period for whatever seeds happen to have blown into my head.