Solar Impulse II flies over the Golden Gate Bridge Solar Impulse | Revillard | Rezo.ch Share Visualization of binary stars generating gravitational waves R. Hurt – Caltech/JPL When a Tasmanian devil is ready to give birth, she sticks her rear in the air and “the joeys dribble in the mucus” down into her pouch, says Devil Ark general manager Tim Faulkner. The four joeys that reach her teats first will spend several months developing in her pouch before emerging to ride on her back. Australian Reptile Park/Devil Ark