Sometimes, if you're out shopping late at night (and perhaps lost where you parked your car), you might notice a blinking blue light in the parking lot. This isn't a standard parking lot light, but a ...

Ponder the red-backed poison frog. In nature, red can issue a warning to predators — stay away, the aposematic message reads. On the road, red can be a warning of its own, often flashing on emergency ...