If you have a pet, you know how a friendly dog or curled-up kitty enhances your life and becomes a member of your family. Shelters across the U.S. are overflowing with animals wanting a home. Bradshaw ...

Nichole Baxter, 36, didn’t just find her calling — she practically declared it in middle school. “I was the kid who talked to everyone,” she says. “Moving my seat never made me any quieter.” That ...

Consider humans. They get sick and spread disease between each other, and usually take action only after symptoms show up. Last November, five undergrad friends at Caltech wondered: What other ...