Asia

Asia is the world's largest continent by land area and the most populous. It lies in the eastern hemisphere, and is joined to Europe by continuous land; the two continents are sometimes described together as a single unit called Eurasia. The boundary between Europe and Asia is historical and culturally established, typically defined by the Ural Mountains, the Ural River, the Caspian Sea, and the Caucasus Mountains.

Asia comprises more than forty independent countries, including some of the world's most densely populated nations. It displays vast diversity in language, religion, way of life, and economy: there are highly developed and industrialized countries alongside those with lower income. The continent's overall economy is driven by manufacturing, maritime trade, and technology.

Geography

Asia is bounded to the north by the Arctic Ocean, to the east by the Pacific Ocean, and to the south by the Indian Ocean. Its terrain is highly varied: the cold steppes of Siberia, the Gobi and Rub' al Khali deserts, the high plateaus of Tibet, and the fertile river valleys of its waterways. The Himalayan range contains the world's highest peaks, including Mount Everest. The major rivers—Yangtze, Ganges, Indus, Mekong, and Tigris-Euphrates—have long sustained farming and settlement.

Regions

Asia is conventionally divided into subregions: East Asia (including China, Japan, Korea), Southeast Asia (including Indonesia, Vietnam, Thailand), South Asia (including India, Pakistan, Bangladesh), Central Asia (including Kazakhstan, Uzbekistan), and Western Asia or the Middle East (including Saudi Arabia, Iran, Turkey). This division is used for statistical and analytical purposes and is not a fixed political boundary.

History and culture

Asia gave rise to some of the world's earliest recorded civilizations, including Mesopotamia, the Indus Valley, and the Yellow River Valley. The major religions—Islam, Hinduism, Buddhism, Judaism, Christianity, Sikhism, and Chinese philosophical traditions such as Confucianism—originated here. The trade routes known as the Silk Road connected Asia, Africa, and Europe for centuries, transmitting goods, ideas, and technology.

Society and economy today

During the twentieth and twenty-first centuries, Asia has undergone rapid change through urbanization and industrialization. Cities such as Tokyo, Shanghai, Delhi, Jakarta, and Mumbai rank among the world's largest urban centers. Common challenges include air pollution, water scarcity, climate change, and income inequality. At the same time, there is steady progress in education, healthcare, and technological connectivity.