The private, personal character that makes online social networks appealing to people looking to stay in touch with friends and family is also leading data protection advocates from around the globe to criticize the sites.
Armed with some of Europe's most wide-reaching data protection laws, critics in Germany have accused social networks and other online sites of collecting and making commercial use of personal information without members' explicit permission - as required by law.
Google and Facebook are both under investigation in Germany, as well as other countries, for their privacy and data retention practices.
Deutsche Welle looks at the actions being taken against a number of Web sites and how Germans are using the Web and social media.
Edgar Mitchell, one of only 12 people to walk on the moon, has died at the age of 85. He was part of NASA's Apollo 14 crew, which set a record for the longest stay on the lunar surface in 1971.
An Oslo firm have developed a laser gun which kills an out-of-control parasite threatening Norway's massive aquaculture industry.
For Moldovan environmentalist Aurel Lozan the oak tree is a mighty symbol of the country's forest.
What happens when an American musician and an Indian ecologist team up to talk conservation? They spread the gospel of threatened birdsong by setting it to a beat that gets people moving.