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Chinese astronaut delivers lecture from space

20 June 2013 Last updated at 18:25 BST

China's second female astronaut, Wang Yaping, has delivered the country's first-ever video lecture from space.

Speaking to students via live video, Ms Wang used spinning tops, a ball, water and a fellow astronaut to explain physics in zero-gravity.

She was speaking from the Tiangong-1 space laboratory, where the Shenzhou spacecraft is currently docked.

John Sudworth reports.

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