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Lab Animals Stressed Out by Men, Study Finds

Men stress out rodents—and probably most other mammals, including furry pets—with the whiff of their armpit sweat, a new study says.

Monkeys Whisper, Study Says—But Why?

Cotton-top tamarins can choose to keep their voices down when a predator or otherwise unwelcome visitor is nearby, a new study says.

September 1, 2013: Speed Hiking From Mexico to Canada, Coming Face to Face With a Grizzly and More

This week, we set a speed record walking from Mexico to Canada, pack bear spray in the event that we encounter a bear, dog or family member who gets out of line, and cycle across the United States in just 42 days.