Scintillating Scotoma. (Migraine Scotoma). A scotoma is a âblind spotâ in front of the vision. The visual phenomenon of scintillating scotoma usually appears like a âtwinkling shadowâ or âzig zag patternâ before the eyes.While every experience is a little different, the most common symptoms are âblack spotâ or âtwinkling blurâ appearing before the eyes.he visual phenomenon of scintillating scotoma usually appears like a âtwinkling shadowâ or âzig zag patternâ before the eyes. While every experience is a little different, the most common symptoms are âblack spotâ or âtwinkling blurâ appearing before the eyes.
Cancel. Spiders live all over the world, including trees, dry areas, wet areas, under ground and in the oceans. Discover the different varieties of spiders on the earth with information from a science teacher in this free video on spider habitats.ancel. Spiders live all over the world, including trees, dry areas, wet areas, under ground and in the oceans. Discover the different varieties of spiders on the earth with information from a science teacher in this free video on spider habitats.
Spiders live all over the world, but few are native to more than a few habitats. They are well-adapted to various conditions, but thrive in warmer climates (in Antarctica, stowaway spiders are dependent on humans habitations for shelter).Essentially, spiders are found everywhere except for on the Antarctic mainland.Surprisingly, spiders the size of dinner plates have been found on the seabed far below the surface of Antarctic waters. Many spiders spin webs in tree branches, but some live in holes that they disguise with their webs.ssentially, spiders are found everywhere except for on the Antarctic mainland. Surprisingly, spiders the size of dinner plates have been found on the seabed far below the surface of Antarctic waters. Many spiders spin webs in tree branches, but some live in holes that they disguise with their webs.