There are over 2,900 species of snakes ranging as far northward as the Arctic Circle in Scandinavia and southward through Australia. Snakes can be found on every continent except Antarctica, in the sea, and as high as 16,000 feet (4,900 m) in the Himalayan Mountains of Asia.
Schizophrenia symptomsâ¶ are typically separated into 2 categories: Positive symptoms: Feelings or behaviors that are usually not present, such as: 1  Believing that what other people are saying is not true (delusions)  Hearing, seeing, tasting, feeling, or smelling things that others do not experience (hallucinations)
Men and women show different patterns of susceptibility for developing schizophrenic symptoms. Males reach a single peak of vulnerability for developing schizophrenia between the ages of 18 and 25 years. In contrast, female vulnerability peaks twice; first between 25 and 30 years, and then again around 40 years of age.