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New type of stem cell helps your fingers regenerate
Shave off the very tip of your finger or toe and it should grow back. Now we know how. It’s all got to do with some very special cells beneath your nails

Cheetahs win races on acceleration but not speed
High-tech collars fitted on wild cheetahs reveal what is really required to be a winner on the African savannah

Big Brother needs a data privacy policy
The debate over internet and phone surveillance should be conducted in the open, not the shadows

Ötzi the iceman’s cells show battle brain damage
Images from a pinhead-sized sample of a glacier corpse’s brain shows evidence of his final, deadly fight

Goodbye, Goldilocks? The untimely end of life on Earth
From life’s point of view, Earth sits in the solar system’s sweet spot. But new calculations suggest it is teetering on the brink of a solar roasting

Bad bugs: The worst disasters caused by software fails
Clever software makes our lives easier but a glitch can have disastrous consequences – here are six of the worst

Super-pests are fighting back against killer crops
Five of 13 key pests can now eat crops genetically engineered to kill them – but it’s not too late to raise our game

US emissions hit first low since mid-1990s
The latest figures on carbon dioxide emissions suggest US emissions are still falling, while China’s emissions growth is also in decline

Time we all learned how to program the world we want
The next generation of programming languages will put computation directly into the hands of people who can use it best

Are the gods playing marbles on Mars?
A NASA spacecraft has spied a wandering boulder and the scar it left on a Martian slope, but it is a mystery what set the ball rolling