Scientists believed they understood the composition of Neptune and Uranus. They were duped.

The composition of Neptune and Uranus. They were duped. As implied by their names, Neptune and Uranus are ice giants. Despite the fact that humans have only ever dispatched one spacecraft (Voyager 2) toward these distant worlds, scientists believe that ice—plenty of it—is present on these planets. According to some estimates, the water content of … Read more