In an emergency session Monday, European Union leaders threatened to postpone talks on a pact with Russia unless Russian troops pull back from positions in Georgia.
It gingerly considers how to set consequences for Russia and maintain cooperation.
Medvedev approved the move a day after parliament voted unanimously in favor of it.
New process could replace centrifuges but renew threat of nuclear proliferation.
A historian examines the mental landscape that allowed the Holocaust to happen.
High cost of fossil fuel and advanced technology improve this energy source’s prospects.
Giordano Bruno was a philosopher before his time.