human migration
Scientists Identify Oldest Human Footprints in North America in Major Find
The 23,000-year-old "ghost tracks" were primarily made by children and teenagers who were doing work for elders or just hanging around.
We followed a Chinese couple on their annual 1,000-mile journey to see their kids
An estimated 61 million “left-behind children” only see their parents once a year during paid time-off for the Chinese New Year.
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