Not far from this location, another set of footprints suggests that Lucy and her relatives may have lived alongside other bipedal humans, a species that moved quite differently.
site A were not sure what to do. Mary Leakey, the paleoanthropologist, suggested that they could be polyphonic songs, but others were not sure. One anthropologist even suggested that the footprints were left by a small bear walking on its hind legs for a few steps. p>
two years later, Leakey and colleagues made two groups of A. afarensis that had been discovered at the site. g. The crossing, which is now popular, was an exciting discovery that completely overshadowed site A. Ohio State University anthropologist Alison McNathan and her colleagues recently visited site A and its five trails and used Leakey and colleagues' field observations to find the site (not far away. A similar ancient elephant footprint). They re-excavated, carefully cleaned, and recorded the footprints using 3D photogrammetry, a technology that uses multi-dimensional images of an object to map the body in 3D space.After measuring macaques and colleagues by comparison, ancient anthropologists such as A. afarensis, chimpanzees and bears have concluded to the footprints of modern humans, that the footprints belonged to hominins—but they belonged to a different species than Lucy and his relatives. / d>
Bipolarity was not surprising h2>
McNat and her colleagues do not know what kind of hominins left these five traces at site A, and they make no hypotheses about it. However, in their last article on the topic, footprints provide clues to how a person moves and what their feet look like. Everyone who left footprints at position A was much shorter than the usual Arvensis, and the composer's legs were wider and shaped differently than Lucy's feet. p>
Unlike toes. Our big monkey toes stick together. Go to the side and move more freely than the other four, almost like your thumb. A. afarensis big toes are still very much attached to the side, but not as much as monkey toes. And humans who left the track at site A had larger thumbs such as A. afarensis.
A firmer foot appears to be similar to our own, which works better for walking. Based on surviving impressions, the site of the hominin may have an ape-like middle leg that is more flexible than A. afarensis.
"McNut and colleagues wrote. This species adapted to life on two legs roughly simultaneously with Lucy and its relative, A. afarensis, but its traces suggest that it took a different evolutionary path.Details about the mechanisms of our relatives' footsteps early ones.)
Walking this way? The heels are very wide for chimpanzees. And despite their chimpanzee-like legs, they didn't walk like a talking monkey.
When a chimpanzee walks on its two legs, its hip set As a result, chimpanzees' steps are wider and shorter than humans' steps. But Hominin moved differently in position A, cutting one foot in front of the other, as if trying to pass a Pliocene's field test of consciousness.
" Walking seems somewhat erratic, with crossing in. Mary Leakey wrote in In 1976, a chimpanzee - or a bear - considered a masterpiece of climbing stairs nearly impossible, even if it was just a few steps. Modern humans often do not go down this path, it is usually a way to restore balance. After the fall (your loyal reporter suffered only minor injuries trying to replicate it). p>
Both have two main features that help modern humans walk upright: Compared to chimpanzees, our buttocks are extended inward or turned inward, bringing our feet closer together. Our knees are at an angle that puts our feet just below the body's center of mass, so these traits appeared in more than one species until 3.6 million years ago, although the legs still looked quite different. p>
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