At first, it seemed we’d come up empty. Driving slowly through the sanctuary’s loop road, we pulled over to a viewing platform where two birders from Texas peered through their mounted lens. Hundreds ...

Pennsylvania weather, with its notorious mood swings from summer scorchers to winter blizzards, becomes irrelevant once you’re inside – racing season at Three Rivers Karting is perpetual, immune to ...

Archaeopteryx is the fossil that clearly demonstrated Darwin's views. It's the oldest known fossil bird, and it helps show that all birds -- including the ones alive today -- emerged from dinosaurs.

CAST, groups fine details into object-level concepts as attention moves from lower to high layers, outputting a ...

At a site known as Natural Trap Cave, a team of scientists are rappelling down to uncover the secrets of what the Earth was ...