Huge scrapyard tech could hurl giant lightning bolts
An electrical engineer in San Francisco wants to build two 10-storey-high Tesla coils from recycled equipment to produce stadium-sized electrical arcs
Herschel may have changed how Turner painted the sun
In the 19th century, painter J.M.W. Turner started portraying the sun as an object. But did he do so because he overheard William Herschel's lectures?
Olympus BioScapes winners find art in microscopic life
The 2011 Olympus BioScapes competition brings the beauty of micro-organisms out of the lab - here are our favourite images
One-Minute Physics: How to weigh money with your mind
Watch how you can quickly approximate the mass of an unknown quantity
Siri hack lets you adjust thermostat with your voice
A proxy server could let you control anything by talking to Apple's new assistant
Volcanic ash camera in first tests over Mount Etna
These exclusive pictures show the world's first in-flight ash detection system testing its mettle over Sicily's infamous volcanic potboiler
Fetus donates stem cells to heal mother's heart
Mouse fetuses will send stem cells into their mother's heart to repair damage - and perhaps boost their own survival prospects
Tim Minchin uses comedy to open a door to rationalism
With his heavy eyeliner and quirky act, comedian and musician Tim Minchin considers himself a "gateway drug" to science, philosophy and rationalism
Rats became the ultimate human pest four times over
The first evolutionary analysis of black rats shows that the rodents evolved to become human pests on four separate occasions
Electron tweezers reveal their pluck
Beams of electrons can pick up and move tiny objects, just like optical tweezers that manipulate items using light
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