IDAHO FALLS – Scientists studying pack rat middens at the City of Rocks National Reserve in south-central Idaho have determined that the area’s iconic pinyon pine trees first arrived about 2,800 years ...

It's a simple concept: a pile of discarded shells. They're not at all the beautiful sea shells that are collected along the shore not far away. The simple mound, also called a midden, is all that ...

There’s nothing especially remarkable about archaeologists studying stone tools and shell middens—unless they weren’t made by humans. A new study suggests that sea otters create a distinct ...