20 March, 1852 – Harriet Beecher Stowe publishes her novel Uncle Tom's Cabin

The anti-slavery story played an important role in setting the scene for the American Civil War.

21 March, 1970 – Earth Day is celebrated for the first time

The first edition was limited to some cities in the United States. Today, Earth Day is observed by about one billion people around the world.

22 March, 1993 – The Intel Corporation produces the first Pentium microprocessor

Intel holds about 80% of the world market share in the PC microprocessor business.

23 March, 1956 – Pakistan becomes the world's first Islamic republic

The Dominion of Pakistan also included the area of modern-day Bangladesh or East Pakistan, which seceded in the year 1971.

24 March, 1965 – Millions watch NASA spacecraft Ranger 9 crash into the Moon

The U.S. space probe broadcast live pictures back to Earth, enabling TV viewers to follow its approach to the Moon and its controlled crash.

25 March, 1995 – WikiWikiWeb, the world's first wiki, is launched

Ward Cunningham introduced the wiki, or user-editable website. Today, Wikipedia is the world's most well known and widely used wiki.

26 March, 1975 – The Biological Weapons Convention comes into effect

The treaty bans the development, production and stockpiling of biological and toxin weapons. It has now been ratified by most countries worldwide.