As inexplicable as it may seem for a tree to grow with a twisted trunk, there are actually logical reasons for this to happen. In some cases, a tree's trunk may have a spiral pattern on it because ...

Most of the long-period comets in the Solar System come from the outer Oort Cloud. The inner region is much more stable. It's ...

"The disk, when viewed from a distance, would appear as a spiral structure with two twisted arms," the authors wrote. Those "arms" resemble the elongated structures of a spiral galaxy, like our ...