Who hasn't wondered if there is life elsewhere in the universe? What would it look like? How would it function? Through biology, especially evolutionary biology, we can make educated guesses as to the form and function of the flora and fauna of other worlds. Kiang et al. go a step further, into a realm seldom imagined. They calculated the photosynthetically relevant radiation on earth-like planets orbiting other stars. The results are surprising. Different stars have different optimal photo spectra. Therefore, plant colors on other worlds might be different from plants on earth to capitalize on these differences. This would no doubt have cascading effects to all other species on those planets. Imagine blue lizards adapted to hide among blue leaves, and the birds adapted to find them.
Photo by Vincent Lillis.