Barack Obama has hailed health workers battling Ebola. The US president is seeking to reassure the public amid controversy over quarantine measures imposed by some authorities.
The World Health Organization says there could be a decline in the rate of Ebola cases in Liberia. The UN health agency made the announcement during a press conference in Geneva.
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Current topics in research and projects in Germany and Europe
For over a century, scientists believed it was impossible to see viruses and single molecules with a microscope. But three researchers broke through this "physical limit" and are now Nobel Laureates.
Energy-saving light-emitting diodes have conquered the world. Diodes for red and green light have been on the market for 50 years. But blue was a huge challenge - until three Japanese physicists came along.
Men are said to be better than women at creating maps in their brains. But as the three winners of the 2014 Nobel Prize in Medicine show, even mice have brain cells for navigation.