The Aussies are justifiably proud of the largest coral reef on earth – the Great Barrier Reef. It can be seen from space and is believed to be the world’s biggest single structure made from living organisms. Composed of some individual reefs and 900
this is called a cranial suture and it connects the different plates of the skull. It is made up of small ligaments that actually move ever so little with breathing. With disease or pathology these will become hardened.
This composite image of the Tycho supernova remnant shows the scene more than four centuries after the brilliant star explosion witnessed by Tycho Brahe and other astronomers of that era. The explosion has left a.