On a cold December morning in 1975, Soviet dissident Andrei Sakharov met a Norwegian diplomat on a Moscow street to hand over ...

and the father of the Soviet hydrogen bomb who later campaigned against nuclear weapons. Authorities denied him the right to leave the country to receive the peace prize. Fifty years on, newly ...

and the father of the Soviet hydrogen bomb who later campaigned against nuclear weapons. Authorities denied him the right to leave the country to receive the peace prize. Fifty years on ...

and the father of the Soviet hydrogen bomb who later campaigned against nuclear weapons. Authorities denied him the right to leave the country to receive the peace prize. Fifty years on, newly ...

As President Trump casts doubt on U.S. alliances, Poland needs to double its military manpower and consider more destructive ...

Perhaps most importantly, Germany developed gas centrifuges, which are more efficient than calutrons and gaseous diffusion ...