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.
An executive from Google has broken the record set by an Austrian skydiver in 2012, jumping from more than 25 miles above the Earth's surface. Alan Eustace was part of a project to develop commercial spacesuits.
China is sending a spacecraft to the moon to prepare for a futre moon landing. A memorial mini satellite from the German airspace company LuxSpace/OHB is traveling piggyback.
The EU has lowered its climate targets. It's a very worrying signal, says DW climate correspondent Irene Quaile, and reason for arguing that the EU has lost its position as climate leader.
European Union leaders meeting in Brussels have agreed on a new target for the reduction of greenhouse gases by 2030. Members also reached a deal on increasing the proportion of renewable energy used.