A scotoma is a strange name for a common problem. A scotoma, pleural is scotomata, is an area of diminished or absent vision that is surrounded by an area of normal or near normal vision.It comes from the Greek work for darkness. scotoma is a strange name for a common problem. A scotoma, pleural is scotomata, is an area of diminished or absent vision that is surrounded by an area of normal or near normal vision. It comes from the Greek work for darkness.
Spinosaurus (meaning spine lizard) is a genus of theropod dinosaur that lived in what now is North Africa, during the lower Albian to lower Cenomanian stages of the Cretaceous period, about 112 to 97 million years ago.
Mostly living in the water, Spinosaurus may have been more likely to tussle with the 25-foot-long (7.6 meters) sawfish of the era. Those were armed with a massive snout lined with jagged, spiky teeth called denticles.