Armadillo's first space trip may speed commercial dream
Step aside SpaceX and Virgin Galactic: this launch will be a sign that a genuine diversity of operators is emerging, which has long been the promise of commercial spaceflight
Friday illusion: Impossible roof defies gravity
See a new "impossible" illusion that demonstrates how our brain makes sense of ambiguous features
Improbable science that makes you laugh - thoughtfully
The Ig Nobel prizes celebrate science that makes you laugh, then makes you think. We talk to their founder, Marc Abrahams
Will computers or humans fly airliners in formation?
Ambitious plans for more efficient ways to fly airliners, including flying them closer to each other, will require ever more computerisation. Safety, as ever, is at issue
Zoologger: Social sharks that learn a trick or two
The lemon shark is no great white: it likes the social life and can even learn new tricks from its friends
Seals use bioluminescence to hunt underwater prey
The ethereal glow produced by animals deep in the ocean could be key for southern elephant seals on the hunt
Feedback: Excessively polite signs
Signs that apologise for their own existence, a return of "snow" to our TV screens, undrinkable alcohol, and more
Destroying the powerful and destructive race construct
Nina Jablonski unpicks the troubling history that linked skin colour and inferiority, leading to slavery, civil war and oppression
FBI launches $1 billion face recognition project
The Next Generation Identification programme will include a nationwide database of criminal faces and other biometrics
Up, up and away: Chimeric bicycles take to the skies
Is it a bird? Is it a plane? No, it's the start of a new extreme sport - pedal-powered flying
Astrophile: Lucky strike turns a dark cloud into a star
A "bullet" is hitting the inky cloud Barnard 68, which means it could offer one of the best views yet of the earliest stage of star formation
Acupuncture treatment is not as safe as advertised
The author of the first study into the side effects of acupuncture says the findings suggest the risks may outweigh any benefits
Battle of the blades: tech of the Paralympic 100-metre final
Tonight's Paralympic men's 100-metre final will pit Oscar Pistorius against Alan Oliveira, who beat him in the controversial 200-metre final - sparks may fly
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