Most of us are familiar with the urge to pick up a seashell from the beach or keep a stone from a hiking trip. The object itself may be ordinary, but to the person who keeps it, it serves as a reminder of a particular moment, place or person. Where did this behavior come from?

Source: [Phys.org](https://phys.org/news/2026-11-early-humans-keepsakes-years.html)

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