Setting aside the notion of determining the number of individual animals on the planet for a moment, merely determining the number of species on the Earth is challenging. Science has only been able to offer estimates thus far, and totals vary greatly.
People who have early onset Alzheimer's may be in any stage of dementia â early stage, middle stage or late stage. The disease affects each person differently and symptoms will vary. If you are experiencing memory problems: 1  Have a comprehensive medical evaluation with a doctor who specializes in Alzheimer's disease.
Brain cancer is one of our most terrifying diseases. All too often, it kills with appalling speed; the most common primary brain cancer in adults, glioblastoma multiforme, is also the deadliest. In the United States, only half of patients receiving the standard treatments survive for a year after diagnosis. Fewer than one in ten are alive ï¬ve years later.