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25 years after Chernobyl 25 Years After: Scenes from Chernobyl--The Worst Nuclear Accident in History [Slide Show]
On the eve of the 25th anniversary of the nuclear disaster at the Chernobyl power plant in Ukraine, Scientific American frequent contributor Charles Q. Choi traveled to the site and snapped these haunting images


Island of Stability
A nuclear chemist aims to create entirely new elements to add to the periodic table. Aired October 3, 2006 on PBS.

Watch the full episode. See more NOVA scienceNOW.


Nov. 17, 2010
Antihydrogen trapped for first time
An octupole magnet was critical to trapping antihydrogen atoms by using their small magnetic moments. This simplified version shows how the north and south poles of strategically arranged magnets can immobilize a neutral antihydrogen atom that has a magnetic moment equivalent to a tiny bar magnet.Physicists working at the European Organization for Nuclear Research (CERN) in Geneva, Switzerland, have succeeded in trapping antihydrogen – the antimatter equivalent of the hydrogen atom – a milestone that could soon lead to experiments on a form of matter that disappeared mysteriously shortly after the birth of the universe 14 billion years ago. The first artificially produced low energy antihydrogen atoms – consisting of a positron, or antimatter electron, orbiting an antiproton nucleus – were created at CERN in 2002, but until now the atoms have struck normal matter and annihilated in a flash of gamma-rays within microseconds of creation.


IBM Microscope Gives High-Speed Look at Atoms –
I.B.M. scientists have modified a scanning-tunneling microscope, making it possible to observe dynamic processes inside individual atoms on a time scale one million times faster than has previously been possible.
CLOSE-UP A high-resolution topograph shows the behavior of atoms, as seen through I.B.M.’s modified microscope.

Big news in the world of the periodic table: Element 117 (ununseptium) has been synthesized! The known periodic table is now complete with this heaviest halogen. Next up: ununnovium (119)?! The periodic table below has been updated to include the new element.


Island of Stabiility