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The progenitors of type Ia supernovae, the standard candles that lit the way to dark energy, have been elusive. A largely dismissed scenario has now produced one, but the results aren't what anyone expected.
Retrieving a memory initiates a window of vulnerability for that memory. Simple behavioural methods can modify distressing memories during this window, eliminating fear reactions to traumatic reminders.
The tracks left by organisms are among the most difficult of fossils to interpret. But just such evidence puts debate about the origins of four-limbed vertebrates (which include ourselves) on a changed footing.
The peculiar ultra-fast trembling motion of a free electron — the Zitterbewegung predicted by Erwin Schrödinger in 1930 when he scrutinized the Dirac equation — has been simulated using a single trapped ion.
Retrieving a memory initiates a window of vulnerability for that memory. Simple behavioural methods can modify distressing memories during this window, eliminating fear reactions to traumatic reminders.
A survey of mammalian genomes has unexpectedly unearthed DNA derived from bornaviruses, leading to speculation about the role of these viruses in causing mutations with evolutionary and medical consequences.
An annual excursion to an exclusive Caribbean island has yielded an impressive body of ecological fieldwork. Just don't call it a holiday, says Mark Schrope.
The latest thesis on the disappearance of physicist Ettore Majorana adds little, but reminds us of the Nobel-prizewinning quality of the discoveries he made during his brief career, explains Frank Close.
