Before his political career, he taught at the University of Ghana and also was a visiting lecturer at Temple University in Pennsylvania and Leiden University in the Netherlands.

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This is a full-time paid internship for three months based at the organisation's International Office at Leiden University, the Netherlands, with the possibility for extension for a further three months.

UNESCO: Science writing internship opportunity at EU UniverseAwareness (Deadline: 8 August 2012) | United Nations Educational, Scientific and Cultural Organization

Hong-Sheng Zhao of Leiden University in the Netherlands calculates that a close encounter with another one of the Milky Way's satellites, the Large Magellanic Cloud, could have knocked Sgr into a closer orbit two or three billion years ago.

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