SUBDUCTION ZONES and ISLAND ARCS. Subduction Zones are where cool lithospheric plates sink back into the mantle. It takes about 50 my for the ocean lithosphere that formed in the hot (>1000C) environment at mid-ocean ridges to cool to an equilibrium state and sink to its maximum depth below sea-level.
Ebola generally starts with flu-like symptoms. Though it's known for the extreme hemorrhagic symptoms -- the bleeding out of the eyes, etc. -- not everyone will experience these. In fact, only 20 percent of people will have [these extreme symptoms] Bhadelia said.
Ebola virus disease. Ebola is a severe and often deadly disease caused by a virus. Symptoms include fever, diarrhea, vomiting, bleeding, and often, death. Ebola can occur in humans and other primates (gorillas, monkeys, and chimpanzees). The Ebola outbreak in West Africa, which has occurred since March 2014, is the largest in history.