A new study explains why astronomers have never seen one of these weird objects.
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The best of the rest from the Physics arXiv:
Creating single photons is becoming straightforward. Now engineers have worked out how to steer the photons they produce with the flick of a switch.
A long standing problem of why sperm swim towards surfaces appears to have finally been solved
A new cosmology successfully explains the accelerating expansion of the universe without dark energy; but only if the universe has no beginning and no end.
A new model shows how the spread of ET civilisations can undergo phase changes, providing a deeper insights into the Fermi Paradox
The best of the rest from the Physics arXiv this week:
Telling fact from fiction isn't always easy on the on the Web. Now researchers have discovered a method that could help automate the process.
Quantum computers are now capable of simulating the behaviour of atoms and molecules.
Mathematicians have derived the shape of a roller coaster that gives a perfectly smooth ride