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)
Schizophrenia is a chronic, severe, and disabling brain disorder that has affected people throughout history. People with the disorder may hear voices other people don't hear.chizophrenia. A mental disorder often characterized by abnormal social behavior and failure to recognize what is real. Common symptoms include false beliefs, unclear or confused thinking, and reduced social engagement and emotional expression. PubMed Health Glossary.