Turducken Space Rock: Antarctic Meteorite Hid Comet Inside Asteroid Remains

Our solar system is a whopping 4.5 billion years old. And those earliest days were some of the most interesting for astronomers. That's when the planets formed, building from dust grains into the whole worlds that now populate our space neighborhood. But most of this material has been drastically changed since its early days – incorporated into planets, or baked by the sun and weathered by time. However, if we could find material that hasn’t been ch