How early humans walked the walk

Popular Science | 5/8/2019 | Staff
bluelilly (Posted by) Level 3
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Humans are rarely prey these days, but our compulsion to walk hasn’t changed. Rebekah Gregory decided to have her leg amputated after seventeen surgeries because she had to take pain medication every four hours, but also because she was in a wheelchair most of the time. “That was not okay with me,” she told a CBS reporter. Crossing the finish line of the Boston Marathon with a prosthetic leg prompted her to post that she’d gotten her life back, but in an interview she reveled in the everyday changes: taking her son to the movies, walking through the airport without a wheelchair.

The kind of freedom and independence Gregory described seems to be something that humans work toward in the earliest days and months of our lives, long before we learn to walk. A newborn can’t even hold his head upright while sitting until about four months after birth, much less control his limbs, but if you hold a baby up with his feet against a flat surface, he’ll lift first one foot and then put it down and lift the other, an action that parenting books...
(Excerpt) Read more at: Popular Science
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