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 25th anniversary of Polish democracy is bittersweet. The surveillance state lives on in a different guise. Poland's president, Bronislaw Komorowski, and his wife greet Barack Obama in Warsaw at celebrations marking 25 years of democracy. Photograph: Radek Pietruszka/EPA.