Mexico

The Green Revolution resulted in increased production of food grains (especially wheat and rice) and was in large part due to the introduction into developing countries of new, high-yielding varieties, beginning in the mid-20th century with Borlaug's work.

China

an explosive consisting of a powdered mixture of saltpeter, sulfur, and charcoal. The earliest known propellant explosive, gunpowder has now largely been superseded by high explosives, although it is still used for quarry blasting and in fuses and fireworks.

Britain

This process began in Britain in the 18th century and from there spread to other parts of the world. Although used earlier by French writers, the term Industrial Revolution was first popularized by the English economic historian Arnold Toynbee (1852–83) to describe Britain's economic development from 1760 to 1840

U.S.A New York

Plastics are a group of materials, either synthetic or naturally occurring, that may be shaped when soft and then hardened to retain the given shape. Plastics are polymers. A polymer is a substance made of many repeating units.

Spain And U.S.A

Columbus left Castile in August 1492 with three ships and made landfall in the Americas on 12 October, ending the period of human habitation in the Americas now referred to as the pre-Columbian era. His landing place was an island in the Bahamas, known by its native inhabitants as Guanahani.

Syria

In March 2011, pro-democracy demonstrations erupted in the southern city of Deraa, inspired by uprisings in neighbouring countries against repressive rulers. When the Syrian government used deadly force to crush the dissent, protests demanding the president's resignation erupted nationwide

The Moon

At 02:56 GMT on 21 July 1969, Armstrong became the first person to step onto the Moon. He was joined by Aldrin 19 minutes later.

Trade negotiations. The World Trade Organization came into being in 1995. One of the youngest of the international organizations, the WTO is the successor to the General Agreement on Tariffs and Trade (GATT) established in the wake of the Second World War.

Gutenberg had established the basics of his printing press including the use of a mobile, reusable set of type, and within ten years he had constructed a working prototype of the press. In 1454 Gutenberg put his press to commercial use, producing thousands of indulgences for the Church.

Gutenberg had established the basics of his printing press including the use of a mobile, reusable set of type, and within ten years he had constructed a working prototype of the press. In 1454 Gutenberg put his press to commercial use, producing thousands of indulgences for the Church.

facebook is a website which allows users, who sign-up for free profiles, to connect with friends, work colleagues or people they don't know, online. It allows users to share pictures, music, videos, and articles, as well as their own thoughts and opinions with however many people they like.