Graphene may be the world's strongest material. But put it under enough strain and it simply evaporates into thin air, says a new study of the way graphene breaks.
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Quantum number generators produce random numbers that are measurably different from those that computer programs generate.
Astronomers propose the first objective definition of a planet that separates potato-like objects from spherical ones
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Mathematicians prove that a three-stranded rope is always 68% the length of its component strands, regardless of the material from which it is made.
A team from NIST measures the smallest force ever recorded, beating the previous best by three orders of magnitude
The idea that the Earth shows signs of having repeatedly passed through the tail of a comet does not bear up to scrutiny.
One of the sun's closest neighbors is a wandering, Jupiter-sized object just nine light-years away, say astronomers.
The widespread belief that pulsars are the best clocks in the universe is wrong, say physicists.
The best of the rest from the Physics arXiv this week