There are three primary ways that naturally occurring radioactive isotopes decay: 1  Alpha particle emission. 2  Beta particle emission. 3  Gamma radiation emission.
President condemns Ankara attacks. The current migration crisis is a problem of the entire EU and not of a particular country, Polish President Andrzej Duda said after the end of the Visegrad Group two-day summit in Balatonfuered, Hungary, on Friday.
Legendary: Lech Walesa won the Nobel Peace Prize in 1983 for his defiant opposition to the communists and became Poland's first democratically-elected president after the 1989 fall of communism. Former Polish President Lech Walesa speaks at the National Assembly of Venezuela in Caracas on February 18 (left).