Charting the night sky with exascale computers

Creating multiple universes to see how they run might be tempting to scientists, but it's obviously not possible. That is, as long as you need physical universes. If you can make do with virtual ones, there are far more options.

Children in poor countries 'abused live on web'

The sexual abuse of children in developing countries is increasingly being live-streamed on Internet services such as Skype, Britain's online child protection agency warned on Tuesday.