On Earth, plants are green thanks to our Sun’s light—but Kepler-186f orbits a cooler, redder star. Here’s why alien vegetation might evolve with deep red hues instead of green. ‘Not Constitutional’: ...

Kepler-186f could be Earth-like in many ways—but its light isn’t. Here’s why plants there wouldn’t be green, and what that reveals about life on other worlds Missing hiker found in ‘bad shape' used ...