Riviste scientifiche

Venus’s surface may have never been cool enough for oceans or life

New Scientist - Mer, 13/10/2021 - 18:00
The surface of Venus may have remained extremely hot since its formation, meaning that water in the atmosphere never had a chance to fall to the surface

Jupiter-like planet survived the death of its star without harm

New Scientist - Mer, 13/10/2021 - 18:00
Astronomers have spotted a Jupiter-like planet in its original orbit around a white dwarf for the first time

Poorer nations will be hit by rising energy costs from climate change

New Scientist - Mer, 13/10/2021 - 18:00
Some countries will spend less on power by 2100, but middle-income countries in the tropics and subtropics will spend more to keep buildings cool

Ancient faeces show Iron Age miners ate blue cheese and drank beer

New Scientist - Mer, 13/10/2021 - 18:00
Faeces samples from an Iron Age salt mine have been genetically sequenced, revealing traces of fungi found in blue cheese and beer

Covid-19 news: Conflicting results raise questions over PCR tests

New Scientist - Mer, 13/10/2021 - 14:21
The latest coronavirus news updated every day including coronavirus cases, the latest news, features and interviews from New Scientist and essential information about the covid-19 pandemic

How mRNA is transforming the way we treat illnesses from flu to cancer

New Scientist - Mer, 13/10/2021 - 14:00
The mRNA technique used in covid-19 vaccines recruits our bodies to make their own medicines. That could revolutionise treatments for all manner of conditions – and make personalised therapies cheaper and easier

US becomes world's largest bitcoin miner after China crackdown

New Scientist - Mer, 13/10/2021 - 12:00
The US now has a 35 per cent global market share in bitcoin mining, the largest in the world – the electricity to produce the cryptocurrency may come mostly from coal

Energy watchdog says net zero can protect against future price shocks

New Scientist - Mer, 13/10/2021 - 07:00
The International Energy Agency, a Paris-based energy watchdog, finds that a strong switch to renewables, energy efficiency and electric cars would cushion households against fossil fuel price shocks

Penguins have rare ability to recognise each other's faces and voices

New Scientist - Mer, 13/10/2021 - 02:01
African penguins identify each other using unique features of their physical appearance and vocal calls – making them the second group of birds after crows known to do so

Chilean researchers unhappy following investigation of star neuroscientist

Nature - Mer, 13/10/2021 - 00:00

Nature, Published online: 13 October 2021; doi:10.1038/d41586-021-02682-5

Committee found that University of Chile neuroscientist Claudio Hetz did not deliberately alter published images — but some researchers fear his practices set a poor precedent.

How electric acupuncture zaps inflammation in mice

Nature - Mer, 13/10/2021 - 00:00

Nature, Published online: 13 October 2021; doi:10.1038/d41586-021-02806-x

The neurons behind acupuncture’s effect on inflammation, and how antibiotics affect gut bacteria.

Observation of fractional edge excitations in nanographene spin chains

Nature - Mer, 13/10/2021 - 00:00

Nature, Published online: 13 October 2021; doi:10.1038/s41586-021-03842-3

Using scanning tunnelling microscopy and spectroscopy, fractional edge excitations are observed in nanographene spin chains, enabling the potential to study strongly correlated phases in purely organic materials.

Convergent somatic mutations in metabolism genes in chronic liver disease

Nature - Mer, 13/10/2021 - 00:00

Nature, Published online: 13 October 2021; doi:10.1038/s41586-021-03974-6

Whole-genome sequencing analysis of somatic mutations in liver samples from patients with chronic liver disease identifies driver mutations in metabolism-related genes such as FOXO1, and shows that these variants frequently exhibit convergent evolution.

Oestrogen engages brain MC4R signalling to drive physical activity in female mice

Nature - Mer, 13/10/2021 - 00:00

Nature, Published online: 13 October 2021; doi:10.1038/s41586-021-04010-3

A subset of oestrogen-sensitive neurons integrate melanocortin and oestrogen signalling to rebalance energy allocation in female mice leading to reduced sedentary behaviour and decreasing obesity in oestrogen-depleted female mice

Day–night cloud asymmetry prevents early oceans on Venus but not on Earth

Nature - Mer, 13/10/2021 - 00:00

Nature, Published online: 13 October 2021; doi:10.1038/s41586-021-03873-w

Global climate model simulations of early Venus and Earth show that differences in the cloud regimes prevented ocean formation on Venus but not on Earth.

A bimodal burst energy distribution of a repeating fast radio burst source

Nature - Mer, 13/10/2021 - 00:00

Nature, Published online: 13 October 2021; doi:10.1038/s41586-021-03878-5

For FRB 121102, 1,652 burst events are detected over 47 days, with a peak burst rate of 122 per hour, a bimodal burst rate energy distribution, and no periodicity or quasi-periodicity.

Mutant clones in normal epithelium outcompete and eliminate emerging tumours

Nature - Mer, 13/10/2021 - 00:00

Nature, Published online: 13 October 2021; doi:10.1038/s41586-021-03965-7

The rarity of tumour formation despite the high proportion of cancer-driver mutations in epithelia is explained by the competitive fitness of tumour cells relative to that of surrounding mutant epithelial cells.

An elastic metal–organic crystal with a densely catenated backbone

Nature - Mer, 13/10/2021 - 00:00

Nature, Published online: 13 October 2021; doi:10.1038/s41586-021-03880-x

A rubber-like, metal–organic crystal is reported with a mechanically interlocked catenane backbone, which could allow for easy guest molecule uptake and release.

Structure of Venezuelan equine encephalitis virus with its receptor LDLRAD3

Nature - Mer, 13/10/2021 - 00:00

Nature, Published online: 13 October 2021; doi:10.1038/s41586-021-03909-1

The cryo-electron microscopy structure of domain 1 of the LDLRAD3 receptor in complex with virus-like particles of Venezuelan equine encephalitis virus (VEEV) provides insights into the assembly and entry of VEEV and other alphaviruses.