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Digging up the past can change the ground beneath it

Archaeological excavation uncovers the past but also changes the landscape that has preserved sites for centuries or millennia. These changes influence water flow, soil erosion and the stability of exposed remains. Researchers from Istanbul Technical University and the U.S.

Did early humans collect keepsakes 500,000 years ago?

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?