February 7 is National Periodic Table Day, when we celebrate the efforts of scientists over the centuries to figure out how different elements ...

The modern periodic table, arranged in rows and columns, was first introduced by Dmitri Mendeleev in 1869. At the time, it included the known elements and their properties, but Mendeleev predicted ...

Europeans will soon have to pay €2,000 ($2,200) per thousand cubic meters of natural gas, former Russian president and current deputy chairman of the Security Council Dmitry Medvedev tweeted on ...

Benavidez dominated the action to take a unanimous decision win and is now in line to face the winner of a Feb. 22 rematch between undisputed light heavyweight champion Artur Beterbiev and Dmitry ...

President Obama was cought on an open microphone telling Russian President Dmitry Medvedev he would have more "flexibility" to negotiate on missile defense after the November election.