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Using the water produced by a fuel cell to regulate the flow of hydrogen, researchers have made it act like an internal combustion engine--the more hydrogen you put in, the more power you get out...
An extraordinary new human fossil comes to light
Tropical cyclones remain nature's fiercest storms
A paleoartist reflects on the process of reconstructing prehistoric animals from their fossilized remains
Paleontologists brave wildfires, parasites and scorching temperatures in search of ancient mammal fossils