ahlam1399
06-30-2017, 04:55 PM
Friday is International Asteroid Day. A 24-hour live broadcast will include everything you've ever wanted to k**w about these rocky bits of space debris, the threats they may pose to Earth and what we can gain from studying them.
أكثر... (http://www.cnn.com/2017/06/30/us/asteroid-day-2017/index.html)
أكثر... (http://www.cnn.com/2017/06/30/us/asteroid-day-2017/index.html)