There's nothing magical about the number, yet five digits at the end of their limbs is a motif that runs through all the animals with four limbs, called tetrapods. Even when there are fewer than ...

In this video segment from NOVA: "Judgment Day: Intelligent Design on Trial," paleontologist Neil Shubin recounts a fossil discovery that added another compelling piece to the body of evidence ...

The current run of steelhead trout in the Deschutes River has seen a record number of the fish pass through the Pelton Round ...

Biologists from the Confederated Tribes of Warm Springs and Portland General Electric have successfully gathered over 250 ...

The playful North American river otter is equally at home in the water and on land. It makes its home in a burrow near the water's edge, and can thrive in river, lake, swamp, or estuary ecosystems.

Because all later land vertebrates, or tetrapods, can be traced back to a fish. This encompasses not only amphibians, reptiles and birds, but also mammals—humans included. Yet one mystery ...

The results of the study, titled "Tetrapod sperm length evolution in relation to body mass is shaped by multiple trade-offs," were published in the journal Nature Communications.The corresponding ...

Local trail conditions look supreme heading into the weekend. Most trails below 5,000 feet are rideable and will have dried ...

RACINE, Wis. (CBS 58) -- If you want to see the process of wood carving starting with logs and finishing with a beautiful artistic object, then head to Racine's River Bent Nature Center for the ...

A Minnesota Boat Club eight-man scull plies the waters of the Mississippi River on a training row in St. Paul early Aug. 19, 2009. (John Doman / Pioneer Press) Wondering how long the Mississippi ...

Where a river begins Features of a river's upper course How waterfalls, gorges and other physical features are formed Wildlife you might find near or in the upper course This resource is suitable ...

A river is divided up into three sections called courses. There is the upper, middle and a lower course. A river starts in the upper course, usually an elevated section of land such as a mountain ...