The Trump administration deleted a major climate resource.
It pulled down the federal website that houses national climate assessments, reports that show how climate change affects every region of the US and that have been published every four years or so since 2000. Researchers working on the next national assessment were dismissed in April.
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Yahoo
36 minutes ago
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HRT ‘can raise breast cancer risk' in younger women
Hormone replacement therapy can raise the risk of breast cancer in some younger women, a Lancet study suggests. An international team of researchers found the treatment was not linked to young onset breast cancer overall. But oestrogen plus progestin therapy appears to increase breast cancer risk by 10 per cent. Meanwhile, oestrogen hormone therapy use appeared to decrease breast cancer risk by 14 per cent. Hormone replacement therapy is a treatment used to help menopause symptoms. There are different types of HRT, which is used to treat menopause symptoms, available. They contain different hormones: some are oestrogen products; others contain progestogen and other types have both. These medicines can be taken or used in different ways and work by replacing the hormones oestrogen and progesterone, which can fall to lower levels as women approach the menopause. Most studies examining links between hormone therapy and breast cancer risk have been explored in older women. Previous work, which has focused on women who have already been through the menopause, suggest that oestrogen plus progestin hormone therapy is a risk factor for breast cancer. The researchers, led by academics from the National Institute of Environmental Health Sciences in the US, wanted to explore the risks among younger women on hormone therapy – who may take these drugs after gynaecological surgery or during perimenopause. The new meta-analysis published in the journal, Lancet Oncology, examined data drawn from previous studies of 459,476 women aged 16 to 54 years old. Some two per cent of this group (8,455) developed young-onset breast cancer, which means the disease was diagnosed before they were 55 years old. And 15 per cent of women involved in the study reported using hormone therapy, with oestrogen plus progestin hormone therapy and oestrogen being the most common types. 'Although the strength of these associations might vary by age at first use, duration of use, gynaecological surgery status, and other factors, unopposed oestrogen hormone therapy use appears to decrease breast cancer risk and oestrogen plus progestin therapy appears to increase breast cancer risk,' the authors wrote. 'The findings can be used to augment clinical recommendations for hormone therapy use in young women, for whom guidance was previously scarce.' Dr Kotryna Temcinaite, the head of research communications at Breast Cancer Now, said: 'These results are largely in line with what we already know about taking HRT for menopausal symptoms and its effects on breast cancer risk – for most people, the risk of developing breast cancer because of taking HRT is small and is outweighed by the benefits. 'Taking HRT is a very personal decision and, as such, it's vital that everyone has the information they need on the benefits and risks, discusses them with their GP or specialist team and is supported to make the choice that's right for them.' Broaden your horizons with award-winning British journalism. Try The Telegraph free for 1 month with unlimited access to our award-winning website, exclusive app, money-saving offers and more.
Yahoo
an hour ago
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Dino disco: 100-million-year-old giant courtship arena discovered in Colorado
At Dinosaur Ridge, researchers uncovered a remarkable and unusual site where dinosaurs gathered and performed mating dances over 100 million years ago—and it might be the largest 'lekking' area ever found. A team of paleontologists recently published their groundbreaking discovery of possibly one of the most significant mating sites from the dinosaur age. 'Lekking' refers to the elaborate mating dances that male dinosaurs would present to females. Today, some modern birds carry on this ancient tradition as descendants of the dinosaurs. In these displays, males engaged in energetic movements while females observed and selected a partner based on the performance. Researchers had previously noted the existence of five fossilized scrape marks at Dinosaur Ridge. After a closer investigation, however, they discovered much more than a few traces of this ritual. Aerial images revealed 35 marks made by different dinosaurs, making this former wetland home to one of the largest mating destinations in the ancient world. Once upon a time, 100 million years ago, many species walked through this former wetland, such as duck-billed hadrosaurs and ostrich-like herbivores. They left track marks in the soft Earth. Nearby, researchers discovered that they marked solid rock on a slope with a more dynamic set of traces, suggesting they began their mating rituals here. Paleontologists gathered aerial images of the site, which is, in a humorous twist of fate, closed to foot traffic to preserve and protect the track marks. They did not expect to uncover what appeared to be a space more like a dance club where dinosaurs would gather and dance, hoping to secure a mate. Dr. Caldwell Buntin of Old Dominion University, the study's lead author, told IFLScience that Martin Lockley, who first identified the trace fossils, determined they were likely related to mating displays after ruling out other possibilities such as nesting, foraging, territorial marking, or water-seeking behavior. Buntin and his team wanted to evaluate the validity of Lockley's findings that these were, in fact, traces of a mating dance using a data-driven approach. High-resolution drone imagery revealed 35 Ostendichnus, the scientific name for this specific type of claw marks associated with the dance of sex, according to the study. Buntin told Science that he believed Ornithomimids, or ostrichlike herbivores, and Acrocanthosaurus, which looks like a both used this sacred ground to populate their species. These markings—bowl-shaped and long and thin as if the dinosaurs kicked back their feet—were clustered together at different layers of the rock. Researchers understood that the element of time was present. These dinosaurs returned to this site over generations to put themselves out there—to attract a female. 'These traces were generated by backward kicking movements repeated by both the left and right foot,' Buntin said. In interpreting the choreography, researchers understood that the dinosaurs turned clockwise and scraped their claws through the sand. The circular markings suggest that, later, they might have nested here. Scientists have only found three lekking sites worldwide. Already a rare discovery, the site at Dinosaur Ridge might be 'the clearest case yet of a dinosaur display arena,' according to Amy Atwater, the site's director of paleontology. Buntin told Science that future work might require the state of Colorado to allow researchers to visit it, so they can study the traces of mating up close, as they still cannot make any definitive statements as to who these markings belong to. Nonetheless, some of it is open to the public, so dinosaur lovers can visit one of the world's only and most popular hiking sites. This site stands to contribute to the field and provide new insights into the ancient beasts that once ruled the Earth—the dinosaurs. The discovery of 35 scrape sites offers new insight into dinosaur courtship, showing they likely performed display behaviors to attract mates. The study was published in the journal Cretaceous Research.
Yahoo
an hour ago
- Yahoo
Falcon 9 sends 27 Starlink satellites into orbit
SpaceX sent more Starlink satellites in orbit early Wednesday. The Falcon 9 rocket launched from Cape Canaveral Space Force Station just before 2:30 a.m. It's sending 27 Starlink satellites into low Earth orbit. Following the stage separation, the first stage landed on a drone ship in the Atlantic Ocean. Click here to download our free news, weather and smart TV apps. And click here to stream Channel 9 Eyewitness News live.
