Meteorite That Smashed Through a New Jersey Roof Hid an Ancient Chemical Secret
一颗穿过新泽西州屋顶的陨石携带着一个惊人的秘密：原始小行星内部存在古代咸液和复杂有机化学的证据。事实证明，一颗撕裂新泽西州屋顶的太空岩石不仅仅是一种天文好奇心。里面密封着古代咸液的痕迹[...]
Astronomers Find Ancient Black Holes Shining With the Power of a Trillion Suns
欧几里得不断扩大的类星体普查揭示了宇宙婴儿期如何出现巨大的黑洞。超过 130 亿年前，两个明亮的物体从刚刚形成的星系中闪耀出来。它们的光是在宇宙只有 6.7 亿年历史时产生的，现在已经到达欧洲航天局的欧几里得空间 [...]
These “Good” Immune Cells Could Hold the Key to Spinal Cord Regeneration
来自中性粒细胞的 Il-4 信号有助于斑马鱼控制炎症并再生受损的脊髓。受损的人类脊髓很少能自我修复。受伤后的免疫反应可能会变得过度，产生持久的疤痕组织，阻止神经细胞及其连接的重新生长。斑马鱼的反应非常不同，能够很好地控制炎症 [...]
New Research Questions Decades of Low-Fat Dairy Advice
研究人员发现，人们可以每天食用三份全脂乳制品，而不会对体重、身体成分、能量代谢或血脂水平产生不利影响。多年来，人们在浏览乳制品货架时往往会倾向于脱脂牛奶和低脂产品，这主要是因为全脂乳制品含有饱和脂肪。然而乳制品对健康的影响 [...]
Researchers Solve Mystery Behind Contradictory Weight-Loss Drug Paradox
style="text-indent: 2em; "Opposite actions on the same receptor can promote weight loss by targeting different brain circuits. Two obesity drugs can push the same brain receptor in opposite directions and still lead to weight loss. Researchers at the University of Cambridge have now traced that apparent contradiction to two
Forgotten Autobiography Rewrites the Story of a War of 1812 Soldier
style="text-indent: 2em; "A rediscovered memoir reveals the harsh realities faced by a disabled veteran in nineteenth-century Britain. After a musket ball destroyed his left forearm during the War of 1812, Shadrack Byfield retrieved the amputated limb from a refuse pile and buried it himself. He later designed a prosthetic d
Ancient Egyptian Princesses Were Trained Warriors, Their Bones Reveal
强壮的肌肉附着和愈合的骨折表明皇室女性可以使用随葬的武器，同时也表明崇高的地位并不能保护她们免受苦难。曾被认为失踪的六具皇家木乃伊在 2020 年重新出现，为研究人员提供了研究五位古埃及公主和何王的新机会。这些女性包括 [...]
Long-Lost Megalodon Fossils Found Hiding on a Museum Shelf
失传已久的巨齿鲨椎骨重新引发了有关巨鲨的疑问，同时也暴露了博物馆藏品的脆弱性。几十年来，几块巨大的鲨鱼椎骨一直静静地躺在博物馆的架子上，没有引起人们的注意。一旦被识别出来，这些长期失踪的化石就重新打开了了解巨齿鲨（现在正确的 Otodus 巨齿鲨）生活的罕见窗口，巨齿鲨是有史以来最大的掠食者之一 [...]
Two-Year Lifestyle Program Boosts Cognition 55% More in Older Adults
与单独灵活的健康指导相比，根据文化定制的生活方式计划和持续的支持可以带来更大的认知改善。在 11 个拉丁美洲国家，有痴呆症风险的老年人通过适应当地文化的生活方式计划改善了他们的记忆力和思维能力。最大的收获出现在那些接受定期辅导、监督活动和结构化社交[...]
Speaking More Languages May Slow Brain Aging
多语言体验可能有助于保持年轻的大脑连接模式，尽管还需要进一步研究来确定原因。语言之间的切换需要持续的关注。说话者可能需要选择一个词汇，抑制另一个词汇，并适应不同的声音或语法，所有这些都在几秒钟内完成。在欧洲神经科学学会联合会 (FENS) 上发表的研究 [...]
Experimental Eye Drops Restore Sight in Blind Mice
Error 500 (Server Error)!!1500.That’s an error.There was an error. Please try again later.That’s all we know.
Coffee’s Most Destructive Pest Is Accidentally Helping the Ants That Hunt It
style="text-indent: 2em; "A tiny coffee pest may be building the perfect hideout for its own predators. Coffee berry borers tunnel deep into coffee fruit, where they feed and reproduce beyond the reach of many predators. But after tiny ants force the beetles out, some species appear to claim the abandoned chambers as nurseri
Cells Join Forces To Survive Prolonged Mechanical Strain
style="text-indent: 2em; "When tissues are stretched for hours, their cells rebuild their internal support system. A cell’s nucleus is usually anchored inside a protective web of protein fibers. But when tissue remains stretched for hours, that arrangement can break apart. Researchers have discovered that epithelial cells re
When Gut Bacteria Run Out of Fiber, They May Start Eating You
style="text-indent: 2em; "When plant nutrients run low, some gut bacteria may turn on their host and begin consuming the intestines’ protective lining. The health effects of a plant-based diet may depend not only on what gut bacteria eat but also on whether they begin feeding on the gut itself. New research suggests that fib
Scientists Discover the Brain May Enter a New Biological Phase Between 50 and 75
一项单细胞研究揭示了衰老人类海马体内免疫细胞、基因组组织和基因调控的重大变化，为大脑衰老和与年龄相关的痴呆症提供了重要见解。大约在 50 岁到 75 岁之间，人类海马体的细胞结构开始发生变化。免疫细胞发生变化，基因组的物理组织减弱，并且 [...]
New Research Reveals Autistic Brains Process Faces Differently
Error 500 (Server Error)!!1500.That’s an error.There was an error. Please try again later.That’s all we know.
Is Sparkling Water Bad for Your Teeth? A New Study Has Answers
一项研究发现，不加糖的苏打水降低口腔 pH 值的程度低于加糖苏打水。根据对几种常见饮料的比较，一小口苏打水会短暂地使口腔变得更酸，但不如加糖苏打水那么酸。研究结果表明，选择不加糖的碳酸饮料代替苏打水[...]
Scientists Discover an Odd Genetic Trait in an Ancient Aboriginal Food Plant
澳大利亚本土小米可能携带着原住民数千年来收获、储存和植物管理的基因指纹。从空中俯瞰，海峡之国就像一幅生机勃勃的广阔挂毯，水道网络纵横交错。它分布在澳大利亚内陆地区超过 280,000 平方公里，是 [...]
