Chaco Canyon was once the vibrant religious center of a Native American culture whose collapse long remained a mystery—until ...

New packs are formed when a male and female go off on their own and nest in an area that doesn't already contain a pack. Brown rats are usually led by the largest male in the pack.

Pack rat nests, or middens, offer important research opportunities, said Potter, for those who brave the stench. Image | Baby woodrat.

It was freed just outside the entrance of a pack rat nest. Technically, that might qualify as being dropped off at a rattlesnake restaurant.

Pack rat nests, or middens, offer important research opportunities, said Potter, for those who brave the stench. ...