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Graham Southorn, BBC Focus magazine
It is currently Mar 1st, '15, 17:39
Physicists have sent a beam of twisted light 3km through the air above Vienna.
It is the first time that information has been transmitted outdoors using the "twist" of a visible light beam.
This twisting property could allow very fast communication because light with different amounts of twist, encoding separate channels of information, could be sent simultaneously.
Reported in the New Journal of Physics, the technique was tested by sending three images of famous ...
Image Credit: Greek Culture Ministry
Archaeologists in northern Greece have found a skeleton inside a tomb from the time of Alexander the Great, during a dig that has enthralled the public.
The burial site at Amphipolis is the largest ever discovered in Greece.
The culture ministry said the almost intact skeleton belonged to a "distinguished public figure", given the tomb's dimensions and lavishness.
Chief archaeologist Katerina Peristeri said "the tomb in all probability belongs ...
European robot probe Philae has made the first, historic landing on a comet, after descending from its mothership.
The lander touched down on Comet 67P/Churyumov-Gerasimenko at about 1605 GMT.
There were cheers and hugs at the control room in Darmstadt, Germany, after the signal was confirmed.
It was designed to shine a light on some of the mysteries of these icy relics from the formation of the Solar System.
The landing caps a 6.4 ...
Image Credit: EPFL
Feelings of a ghostly presence - the sense that someone is close-by when no-one is there - lie in the mind, a study has concluded.
Scientists say that they have identified the parts of the brain that are responsible for generating these spooky sensations.
They have also created an experiment that makes some people feel like there is a ghost nearby.
The research is published in the journal Current Biology.
Image Credit: AlMA / C Brogan / B Saxton
The clearest ever image of planets forming around an infant star has been taken by the Alma radio telescope.
In a vast disc of dust and gas, dark rings are clearly visible: gaps in the cloud, swept clear by brand new planets in orbit.
The sun-like star at the centre, HL Tau, is less than a million years old and is 450 light years from ...
Observations of a cosmic confrontation between a huge gas cloud and the black hole at the centre of our galaxy have sparked debate among astronomers.
Celestial fireworks were thought to be a possibility as the gas was torn apart by the black hole.
But their absence so far has rekindled suggestions that it may not be a pure gas cloud after all.
One study suggests the cloud, named G2, is in fact a pair ...
Image Credit: CIBER / JPL / CalTech
A new study of the universe's background light has suggested that as many as half its stars might be hidden in the space between galaxies.
Measurements were made by two cameras sent beyond the atmosphere on a rocket.
After subtracting all the interference from dust and galaxies, the leftover light has ripples in it, which the study's authors ascribe to lone stars, flung out during galactic collisions. ...
The genetic ancestry of the earliest Europeans survived the ferocious Ice Age that took hold after the continent was initially settled by modern people.
That is the suggestion of a study of DNA from a male hunter who lived in western Russia 36,000 years ago.
His genome is not exactly like those of people who lived in Europe just after the ice sheets melted 10,000 years ago.
But the study suggests the earliest Europeans did ...
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