Neutrino ripples spotted in space

Mark Peplow

Universal lumpiness is imprinted in mysterious particles.

Astronomers have spotted a signature of neutrinos created just seconds after the Big Bang. The find supports current models of the origins of our Universe, and may provide a glimpse of its birth.The fundamental particles called neutrinos are difficult to study, because they interact so weakly with normal matter - trillions whizz straight through your body every second. But Roberto Trotta, an astrophysicist from Oxford University, UK, and his colleague Alessandro Melchiorri of the University of Rome 'La Sapienza', Italy, say that the signature of primordial neutrinos is written in the cosmic microwave background (CMB).

These microwaves are the remnants of light that shone 300,000 years after the Big Bang...


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