Methane could indicate microbial life on Mars - if it is there
Professor Noel Sharkey on the strengths and limititations of robots and AI
The artistic tribute to Nasa's Voyager-1 using audio from Earth and data from Voyager
Why people choose to abstain from food for religious - and non-religious - reasons
Do e-cigarettes really help smokers quit and are they safe?
Scientists have reprogrammed adult cells into stem cells inside living animals
Meet the artists attempting to visualise everyday technologies that we can't see or feel
How human memory works and why some memories are remembered more easily than others
Can scientists bring extinct animals back from the dead?
Scientists show bacteria from humans invade obese mice and slim them down