Asia is the biggest continent in the World, covering an area of 44,579,000 square kilometers. It also has the biggest amount of people, about 60% of the world's population. This area was the site of many of the first civilizations, including The Persian Civilization, Chinese Civilization, Indus Valley Civilization or Mesopotamian Civilization. Asia was the birthplace of most of the world's mainstream religions including Christianity, Islam, Judaism, Hinduism, Buddhism, Confucianism, Taoism (or Daoism), Jainism, Sikhism, Zoroastrianism, as well as many other religions.