In the Yukon, Porcupine caribou travel 3,000 miles. This is the longest migration by land of any mammal on Earth. Monarch butterflies fly about 3,000 miles each year. Some will travel all the way ...

Thogmartin and other researchers have evaluated more than 200 scenarios for restoring greater than 1.3 billion stems of ...

A monarch butterfly feeds at Cape May Point State Park in Lower Township, N.J., Wednesday, Oct. 14, 2020.Get Photo Monarch butterflies roost as the sun begins to set at The Nature Conservancy's ...

Generations have watched in wonder as yellow-and-black striped caterpillars fold into green-and-gold chrysalises and emerge as large orange-and-black butterflies. Monarch's multigenerational migration ...