Green look for red fluorescent lights
The technique works because two different ions, gadolinium and europium, are in the phosphor material. The UV light boosts a gadolinium ion to its excited state. This excess energy is then transferred...
First hint of element 114 seen in Dubna
Researchers at the Dubna Laboratory of Heavy Ion Nuclear Reactions in Russia, headed by Yuri Oganessian, collaborating with a team from the Lawrence Livermore National Laboratory in the US, made the d...
Earth’s poles may switch
“This is certainly the quickest movement since we started measurements in Greenland in 1928, ” says Torsten Neubert, who heads DMI’s Solar-Terrestrial Physics Department. Neubert thi...
Physics and fossils
Many biologists have argued that most species become extinct when new ‘fitter’ competitors arrive on the scene. For example, some scientists believe the dinosaurs became extinct after a la...
Are printed journals heading for extinction?
Scientific publishing is still a highly profitable business. According to Nature, the scientific side of the Reed-Elsevier publishing company made a profit of $378m on sales of $938m in 1997. However,...
Tectonic plate theory shaken on Mars
Mars is now a dry planet with most of its water either tied up in a deep permafrost or lost to outer space. However, images gathered by Mars Observer and earlier space craft such as the Viking orbiter...
Quasicrystals clinch Wolf prize
Quasicrystals are materials that do not have a periodic lattice structure but still display subtle long-range order, such as “five-fold” symmetry, that is not possible in regular crystals....
Ozone mystery is solved
In theory, the creation of ozone – caused by the breakdown of oxygen in the atmosphere by ultraviolet light – is a mass-independent process. However, experiments by Klaus Mauersberger and ...
Macroscopic spin moves
James Kikkawa and David Awschalom of the University of California, Santa Barbara have now shown that they can use electric fields to transport electrons through a distance of 0.1 mm in gallium arsenid...
