[video] Charles Liu appears on CNN International

[youtube]http://www.youtube.com/watch?v=qLLQtN-EDz8&index=1[/youtube]A European robot probe has made the first, historic landing on a comet, known as 67P/Churyumov-Gerasimenko.

Astrophysicist Charles Liu was asked to memorialize this unprecedented moment by joining Quest Means Business on CNN International>

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