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Dogs Evolved Sad Eyes to Manipulate Their Human Companions, Study Suggests
The Same Exact Foods Affect Each Person's Gut Bacteria Differently
The Tree That Might Have Inspired Dr. Seuss' 'The Lorax' Has Died
NASA Wants to Build a 'Starshade' to Hunt Alien Planets
Bone-Crushing Hyenas Lived in Canada's Arctic During the Last Ice Age