Squadrons of small sooty-brown, sickle-winged birds called chimney swifts zip through the air in rapid twists and turns while gobbling up flying insects. Their 5-inch-long bodies taper at both ends, ...

The next time you feel like you’re too small to make a difference, think of the mantis. Scientists have discovered that many species of these badass little bugs habitually hunt, kill, and devour ...