Sometimes thousands of miles from home - if they have a home - and frightened. What is life really like for Russian young offenders, and how do their surrounding compare to British centres?
Although an extraordinary development, life which grows from arsenic rather than phosphorous might not be evidence of a shadow biosphere, says David Rothery.
What happens when people with dementia move out of general hospital and into a Care Home? Caroline Holland is part of a project trying to answer that question.
In this extract from episode six of Breaking Science, Doctor Chris Smith and Helen Scales discuss a scientific development which might, one day, lead to the ability to 'zap' memories