The interstellar comet 3I/ATLAS carries a chemical clue to conditions in the planetary system of its origin, locked away long before it reached our sun. Its methane signature is unusually rich in heavy hydrogen, suggesting that the comet's frozen ingredients took shape in an intensely cold environment around another star—or in the cloud that preceded it.
A research team has designed and synthesized a molecular cage with an internal cavity by connecting two curved π-conjugated molecules face-to-face at three points.
Richard Dawkins’ first work has thrilled fans and frustrated critics for five decades. The science has moved on, but any writer looking to supplant its place must learn its lessons Richard Dawkins’ The Selfish Gene was not predicted to be a success. Its initial print run, published this week in 1976, was just 5,000. It went on to sell millions, and is perhaps the most influential work of pop-science ever. For 50 years, it has been the go-to resource for the layperson seeking to understand evolution. What accounts for its enduring power? Prof Dawkins’ central claim, that “we are survival machines – robot vehicles blindly programmed to preserve the selfish molecules known as genes” was provocative, stripping the messy stuff of human and other life down to a simple law. And yet the book is primarily concerned with proving that complex, selfless behaviour such as altruism in animals can emerge from these basic “selfish” drives, satisfyingly resolving an apparent paradox. Prof Dawkins – a zoologist by training – also succeeded in conjuring entertaining, vividly drawn vignettes of the lives of animals, from lions and ants to hawks and honeybees, to make his points. Do you have an opinion on the issues raised in this article? If you would like to submit a response of up to 300 words by email to be considered for publication in our letters section, please click here . Continue reading...
In 2016, a binary star system emitting unusually strong gamma rays was discovered in our galactic neighborhood. Now, astronomers have found the smoking gun, or rather, a smoking trail of cool molecular gas that suggests jets emanating from a microquasar—one of the few known outside the Milky Way—are responsible.
A computer scientist has achieved a breakthrough in a nearly 25-year-old problem involving how computers calculate distances across enormous networks. The new algorithm delivers more reliable estimates for closely connected points without sacrificing speed, overcoming a longstanding limitation of earlier methods. Its secret lies in a smarter way of sampling network connections at multiple scales.
Randomised trials of omega-6s do not show an increase in inflammation caused by the fatty acid Read more in the Antiviral series If you’ve been online lately, you’ve probably been bombarded with the discourse about seed oils. Once a completely innocuous food that no one really talked about, they have become the enemy of the moment. Robert F Kennedy Jr, the secretary of health and human services in the US, has called them “toxic” and vowed to act against them. There are countless activewear-clad influencers online saying that nothing harms your health more than these products. Which is odd, because the Australian dietary guidelines say seed oils are basically fine. You should limit them because they’re high in calories but otherwise there’s no major reason – according to the guidelines and most experts – why you should avoid them. As Prof Lauren Ball, director of the University of Queensland’s Centre for Community Health and Wellbeing, says: “There’s no convincing evidence that eating seed oils like canola or sunflower oil in normal dietary amounts harms our health. In fact, these oils contain unsaturated fats, which are generally beneficial for cardiovascular health.” Dr Jason Wu, a professor at the University of New South Wales, agrees: “The evidence base consistently points to health benefits of eating seed oils.” Continue reading...
A curious online row over this summer's heatwaves points to a wider - and worrying - shift in climate science.
