Contact Prof. Dr. Mario Trieloff Institute of Earth Sciences Phone +49 6221 54-6022 Communications and Marketing Press Office Phone +49 6221 54-2311   Original publication W. H. Schwarz, M. Trieloff, K. Bollinger, N. Gantert, V. A. Fernandes, H.-P. Meyer, H. Povenmire, E. K. Jessberger, M. Guglielmino, C. Koeberl: Coeval ages of Australasian, Central American and Western Canadian tektites reveal multiple impacts 790 ka ago. Geochimica et Cosmochimica Acta (2016), doi:10.1016/j.gca.2015.12.037   Klaus Tschira Foundation The Klaus Tschira Foundation promotes the advancement of natural sciences, mathematics and computer science and wants to raise appreciation in these fields. The Foundation’s commitments begin in the kindergartens and continue at primary and secondary schools, universities
来源(Source From): http://www.uni-heidelberg.de/presse/news2016/pm20160222_multiple-cosmic-impacts-790000-years-ago.html