Mysterious 'Bright Spots' on Ceres Baffle Experts

NASA's Dawn spacecraft is closing in fast on the protoplanet Ceres - one of two asteroids in our solar system so large that they may even boast their own unique surfaces and thin atmospheres. Imagery taken tens-of-thousands of miles away has now revealed two intriguing bright spots on the asteroid's surface, and experts have absolutely no idea what they could be.