The study was able to directly measure mutations after they occurred in the plant but before mutations could have been affected by natural selection.
A millimeter-sized beetle flies efficiently with feathery wings and a beat mode not seen before. Did it evolve by natural selection?
It must be good if engineers want to copy it. Siphonophores are colonial animals that have mastered the sport of synchronized swimming.
Even something as catastrophic as the eruption of Mount St. Helens was, in the end, a life-giving event.
A planet needs more than location in a habitable zone. It needs the right ingredients, and salt has a surprising role.