International Day of the World's Indigenous People

The International Day of the World's Indigenous People is observed on August 9 each year to promote and protect the rights of the world’s indigenous population. This event also recognizes the achievements and contributions that indigenous people make to improve world issues such as environmental protection. It was first pronounced by the General Assembly of the United Nations in December 1994, marking the day of the first meeting of the UN Working Group on Indigenous Populations of the Subcommission on the Promotion and Protection of Human Rights, in 1982.

History

The International Day of the World's Indigenous People was first pronounced by the General Assembly of the United Nations in December 1994, to be celebrated every year during the first International Decade of the World's Indigenous People (1995 – 2004). In 2004, the Assembly proclaimed a Second International Decade, from 2005 – 2015, with the theme of “A Decade for Action and Dignity.” People from different nations are encouraged to participate in observing the day to spread the UN’s message on indigenous peoples. Activities may include educational forums and classroom activities to gain an appreciation and a better understanding of indigenous peoples.

By resolution 49/214 of 23 December 1994, the United Nations General Assembly decided that the International Day of the World's Indigenous People shall be observed on 9 August every year during the International Decade of the World's Indigenous People. The date marks the day of the first meeting, in 1982, of the UN Working Group on Indigenous Populations of the Subcommission on the Promotion and Protection of Human Rights.

Symbols

Artwork by Rebang Dewan, a Chackma boy from Bangladesh, was chosen as the visual identifier of the UN Permanent Forum on Indigenous Issues. It has also been seen on material to promote the International Day of the World's Indigenous People. It features two ears of green leaves facing each other and cradling a globe resembling planet earth. Within the globe is a picture of a handshake (two different hands) in the middle and above the handshake is a landscape background. The handshake and the landscape background are encapsulated by blue at the top and bottom within the globe.

Lepton epoch - Big Bang

In physical cosmology, the lepton epoch was the period in the evolution of the early universe in which the leptons dominated the mass of the universe. It started roughly 1 second after the Big Bang, after the majority of hadrons and anti-hadrons annihilated each other at the end of the hadron epoch. During the lepton epoch the temperature of the universe was still high enough to create lepton/anti-lepton pairs, so leptons and anti-leptons were in thermal equilibrium. Approximately 10 seconds after the Big Bang the temperature of the universe had fallen to the point where lepton/anti-lepton pairs were no longer created. Most leptons and anti-leptons were then eliminated in annihilation reactions, leaving a small residue of leptons. The mass of the universe was then dominated by photons as it entered the following photon epoch.