A prehistoric biplane?

One of the strangest of ancient reptiles - Microraptor gui, a little dinosaur with feathers on all four limbs, may be stranger than we imagined. The 125-million-year-old reptile fossil, which would have been perhaps 75cm long in life, may have glided through the air with its hind limbs held lower than its forelimbs, creating something resembling a living biplane (or, perhaps more accurately, what we would call a staggerwing).