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.
The history of the Polish nation starts with the reign of Mieszko 1 (962-992) of the House of Piast. Members of the semi-legendary family of Piast had united a number of the Polish tribes under the leadership of the Poljaue.