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Comet C/2023 A3 Tsuchinshan-ATLAS won't return for another 80,000 years, but astronomers say it could be visible to the naked eye this weekend.

Author information:

Charles Marty

Adjunct professor, Carbone boréal, Université du Québec à Chicoutimi (UQAC)

Excerpt from article:

The autumn has arrived and northeastern North America’s forests will soon grace us with a breathtaking palette of reds, yellows and golds. These vivid colours will then fade, giving way to bare branches, as the fallen leaves blanket the forest floor, thereby returning their nutrients to the soil. The spectacle is not as impressive a few degrees farther north, where deciduous trees give way to conifers, which keep their dark green needles through the winter.

These contrasting landscapes are familiar to all of us but have you ever wondered why some tree species shed their leaves in autumn, whereas others don’t, remaining green throughout the year? Why do these two leaf habits co-exist? Do they reflect an adaptation to their environment? These questions have intrigued ecologists for a long time, but it’s only in the past decades that a clear conceptual and theoretical framework has emerged allowing a better understanding of the ecological significance of this trait.

The woman, who has not been named, near Poulsbo, Washington, called the county sheriff, who sent deputies

Before sending humans to Mars, NASA will first return humans to the Moon’s surface to test its technology and train astronauts.

Victor Ambros and Gary Ruvkun won the 2024 Nobel Prize in physiology or medicine for their discovery of microRNAs, molecules that turn genes on and off – and cause disease when they go awry.

Mary Fleming was on holiday in Kenya when she saw it: a mound of secondhand clothes heaped by a river, the pile so vast and unruly it was spilling into the water.

The sight shocked her. At home in Ireland she was a passionate shopper and bought a new outfit almost every weekend. Now, in East Africa, she was seeing the consequence of fast fashion and mass consumption.

A decade later Fleming, now 34, is leading a campaign to prevent waste by swapping, reusing, repairing and repurposing clothes under the inimitable exhortation: “Because secondhand is feckin’ grand.”

The bizarre discovery, detailed in a study that has yet to be peer-reviewed, stems from an experiment in which photons were fired into a cloud of atoms cooled to just above absolute zero. In cases where the photons passed through without interacting, researchers found that the atoms were still briefly excited, as though the photons had been absorbed and re-emitted. Meanwhile, when the photons were absorbed, they seemed to reappear before the atoms could even become excited.

The promising compounda were discovered on an organic farm.

Study: https://www.mdpi.com/2076-2607/11/6/1529

David Jones navigated ‘tangled mess’ of flooding and debris in trek to Tennessee after hurricane ravaged south-east

It’s about studying space junk.

Kononenko was joined by another cosmonaut, Nikolai Chub, along with NASA's Tracy Caldwell Dyson in the landing. His tenure obliterates the previous record held by his fellow Russian Gennady Padalka, who hit 878 cumulative days back in 2015. The 60-year-old space veteran accomplished this feat across five separate missions stretching back to 2008.

Women with premature ovarian insufficiency condition are more likely to develop conditions such as diabetes and lupus

Study: https://academic.oup.com/humrep/advance-article/doi/10.1093/humrep/deae213/7774591

The study, published in the Proceedings of the National Academy of Sciences, took an innovative approach by examining two groups of individuals with focal brain lesions resulting from injuries or disorders. One cohort consisted of 106 Vietnam veterans who suffered traumatic brain injuries in combat decades ago. The other included 84 patients from rural Iowa who experienced strokes, surgical complications, or other brain injuries.

Study: https://www.pnas.org/doi/10.1073/pnas.2322399121

Dom't turn your hobbies into full-time jobs, kids

It even comes with a cartridge slot.

I'm not quite sure how my Stardew Valley experience applies, but Sir yes Sir!

The details of solar’s expansion are even more surprising

Not every country is riding the solar power rocket to the sun just yet. Individual countries have seen peaks and dips in solar installations based on how well their economies are doing and how strong their policy incentives are, like feed-in tariffs, net metering, and tax credits.

In the past couple of years, the global story has really been about China. Add up every solar panel installed in the US in history and you get how much China installed last year alone, almost 60 percent of all new solar installed in the world. The sheer scale of this deployment broke a lot of forecasters’ models.

US physicists show how immense pulse of radiation could vaporise the side of asteroid and nudge it off course

After being medically evacuated from Gaza, a few children with life-altering injuries have arrived at MSF's reconstructive surgery hospital in Amman, Jordan, where they are receiving comprehensive and long-term care.

To reach that surprisingly conclusion, scientists studied the positions of 21 asteroid impact craters during the Ordovician period – the second of six periods in the Paleozoic Era that spanned 41.6 million years, from roughly 485.4 million years ago to about 443.8 million years ago.

Study: https://www.sciencedirect.com/science/article/pii/S0012821X24004230

Ken Wilson had been trying to conserve electricity in order to lower his utility bill, but it was still stubbornly high

The leading idea is that gravity arises from the exchange of hypothetical "graviton" particles, much like electromagnetism arises from the exchange of photons. However, gravitons have always been considered too difficult to observe because they interact with matter very weakly, similar to neutrinos.

Study: https://www.nature.com/articles/s41467-024-51420-8

The state is grappling with the legacy of a surgeon who allegedly mutilated an Aboriginal man's remains.