Why don’t we see any four-winged feathered dinosaurs, these days? Time was, not so many hundreds of millions of years ago, that various theropods sported quite well-developed vaned feathers not just on their forelimbs, but on their hind limbs as well. The most famous, and perhaps most flamboyant of these animals (that we know of) was Microraptor, a small four-winged dromaeosaur known from fossils that, even given their tiny size by dinosaur standards, are among the most spectacular ever found.…
