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Jul 7, 2014 05:00 PM ET // Stephanie Pappas, LiveScience
Square, straight and ringlike ditches scattered throughout the Bolivian and Brazilian Amazon were there before the rainforest existed, study finds.
The mysterious spirals are in fact an environmental art installation.
Apr 15, 2010 05:05 PM ET // Jorge Ribas
The active search for the long-lost bird of science and myth -- the ivory-billed woodpecker -- is officially ending. At least it is for the Cornell Lab of Ornithology. "The preliminary conclusion we've come up with at this point is that it's unlikely that there are recoverable populations of ivory-...
Aug 2, 2012 01:47 PM ET // Benjamin Radford
A UFO was sighted during the opening ceremony at the London Olympics. What was it?