The Fourth of July - Independence Day for America

Independence Day, commonly known as the Fourth of July, is a federal holiday in the United States commemorating the adoption of the Declaration of Independence on July 4, 1776, declaring independence from the Kingdom of Great Britain.

Independence Day is commonly associated with fireworks, parades, barbecues, carnivals, fairs, picnics, concerts, baseball games, family reunions, and political speeches and ceremonies, in addition to various other public and private events celebrating the history, government, and traditions of the United States. Independence Day is the National Day of the United States.

Also on this day of scientific note, Mars Pathfinder, an American spacecraft landed a base station with a roving probe on Mars on 4th July 1997. The mission carried a series of scientific instruments to analyse the Martian atmosphere, climate, geology and the composition of its rocks and soil.

On 4th July 2005,  The Deep Impact collider hits the comet Tempel 1 to analyse it's make up. And on 4th July 2012, the discovery of particles consistent with the Higgs boson at the Large Hadron Collider is announced at CERN.

All in all a day of many achievements in various scientific fields and another reason to celebrate.