摘要
On 21 February 2011 UNESCO Head-quarters in Paris was the site of a celebratory programme commemorating the 50th anniversary of the International Union of Geological Sciences.The celebration began with a viewing of a new video,which vividly demonstrates the role of our sciences and of our Union in serving society worldwide.(Readers can see the video at iugs.org.)After the video,participants were greeted by remarks from the Executive Director of ICSU,Deliang Chen;UNESCO’s Assistant Director General for Natural Sciences,Gretchen Kalonji;and myself as IUGS President.Keynote speaker Iain Stewart,University of Plymouth,UK,discussed how Earth made us.
