Christmas cactus leaves turn red when the plant is stressed, most often due to an error in care. Too much direct sunlight is the most common cause of discolored ...

Explanation of why the Moon turns red during a total lunar eclipse, detailing the March 3 event, Earth’s shadow phases, atmospheric refraction, and eclipse season timing.

If you open a picture in the Photos app on your iPhone, and it inexplicably starts turning red, I wouldn't blame you for being a bit concerned. After all, that's not supposed to happen, and out of all ...

This is the time of year when Nicole Hughes gets constantly distracted by the fall foliage as she drives around North Carolina. "I'm always looking," says Hughes, a biologist at High Point University.