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We are used to heat flowing from hot objects to cool ones, and never the other way round, but now researchers have found it is possible to pull off this trick in the strange realm of quantum mechanics

The shape of the cosmos depends on a balance of two competing forces: the pull of gravity and the expansion driven by dark energy. Columnist Leah Crane explores what observations tell us about how much universe is out there and whether it’s shaped like a sheet, a saddle or something else entirely

Intermittent fasting appears to be no better than doing nothing when it comes to helping people who are overweight or have obesity lose weight

Five dietary patterns that involve eating lots of plants have been linked with living up to three years longer, even among people who are genetically predisposed to have a shorter life

Finding rhinoviruses, which cause the common cold, in preserved medical specimens and analysing their RNA genome could let us trace the evolution of human illness

Simulations suggest that two enormous masses of hot rock have been involved in generating Earth’s magnetic field and giving it an irregular shape

Scientists may have stumbled across a network of vessels in the brain that helps clear out waste fluid – a discovery that could "represent a paradigm shift in our understanding of all neurodegenerative diseases"

Immune cells in the brain that go rogue contribute to the death of neurons, so getting rid of them may slow the progression of neurodegenerative conditions like amyotrophic lateral sclerosis

A growing body of psychological research shows that the best relationships – romantic or otherwise – come with a feeling of personal growth. Columnist David Robson explores the evidence-backed ways to broaden our horizons and connect more deeply with our loves, our friends and ourselves

Life may have begun when RNA molecules began to replicate themselves, and now we’ve finally found an RNA molecule that is very close to being able to do this

The planets around a nearby star seem to be in the wrong order, hinting that they formed through a different mechanism than the familiar one by which most systems grow

The activity of certain neurons may influence our endurance for exercise, and these could be targeted to help us run faster for longer

The idea of self-amplifying gene editing is to get cells to pass on packages of CRISPR machinery to their neighbours, boosting the effect

A fleet of wind-propelled robot boats could act as a sensor network covering a wide area and relay acoustic signals to a submarine

Many researchers thought that earthquakes in the Himalayas recur at regular intervals – but an analysis of sediment cores has shown they are largely random, and the region has seen far more than we previously realised

The Chincha Kingdom was transporting seabird excrement from islands to valleys as early as the 13th century, and this powerful fertiliser may have been key to its economic success

We must find a balance between haste and getting mired in medical inertia

There are huge benefits to ringing the changes when it comes to exercise, finds committed runner Grace Wade when she analyses the science

In George Saunders's Vigil, a ghost visits Earth to help a dying oil tycoon, while terraforming efforts on Mars are about to bear fruit in The Rainseekers by Matthew Kressel. Emily H. Wilson's sci-fi column explores two very different short novels

The books, TV, games and more that New Scientist staff have enjoyed this week