Jaguars once roamed the American Southwest, but their presence faded over the years. Now, new sightings in Arizona suggest ...
The age of the dinosaurs may conjure images of large, fearsome reptiles in the minds of many – but those were far from the ...
Decades of citizen science in Alaska helped researchers figure out how one of the biggest wildlife die-offs -- that of the seabird the common murre -- unfolded.
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