ring may be giant 'impact crater'
BBC News - 9 時間前
The 36-46km-wide feature, identified in DR Congo, may be one of the largest such structures discovered in the last decade. Italian researchers considered ...
The politics of cosmic catastrophe
WASHINGTON, DC—ONE WEIGHTY DECISION that the world will need to make in 2010 is whether to support an idea raised by Anatoly Perminov, the head of the Russian space agency Roscosmos, to launch an unmanned mission to redirect a large asteroid that might collide with Earth after 2030.
Philippine Daily Inquirer - Mar 09 8:39 AM on Yahoo Search
