An 1840s image captures an extremist's fervor
Actor Tom Cavanagh discusses what it is like to go behind the scenes of the Smithsonian museums
New research may shed light on a nearly century-old theory that a sculpture thought to be ancient Greek may be da Vinci’s work
Can a remote, geologically weird island in the South Pacific forecast the fate of coral reefs?
A 1910 wildfire that raged across three Western states helped advance the nation’s conservation efforts
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