"This is the point of no return! Your thirst for gore has led you to the Horrible Histories® website. Here you'll find nasty nuggets and foul facts aplenty. If you lose your way in the labyrinth of long-ago just ask the rat…"
Visit historic and architecturally significant landmarks in Italy. You can now explore inside the Colosseum, see ancient wellness centers, and walk along the Appian Way. "
Population density
Population density is the number of people in a given area (usually given as persons per sq. km.). To find this figure the total population is divided by the area.
Density can be shown on a choropleth map which shows the average density across regions. This is easy to read but disguises major population concentrations.
Diagnostic and Statistical Manual of Mental Disorders, Fourth Edition (DSM-IV) Psychiatric Diagnoses are categorized by the Diagnostic and Statistical Manual of Mental Disorders, 4th. Edition. Better known as the DSM-IV, the manual is published by the American Psychiatric Association and covers all mental health disorders for both children and adults. It also lists known causes of these disorders, statistics in terms of gender, age at onset, and prognosis as well as some research concerning the optimal treatment approaches.