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. ...

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. Image | Baby woodrat.