Robot explorer finds ancient lakes on Mars
The Mars rover Curiosity has found evidence that water once flowed on Earth’s next-door neighbour. Why is this exciting? Because where there is water, there may be life.
Europe joins global race over ‘miracle material’
Light, flexible and super-strong, graphene is set to revolutionise areas as diverse as medicine, electronics and sport. But can it really start a new industrial revolution?
‘Breakthrough’ cancer treatment too pricey for NHS
A new drug seemed set to offer cancer patients a possible lifeline. Now the UK’s health service says it is not worth the cost – but can you really put a price on someone’s life?