2025-05-28 02:10:52动物植物
研究发现,随着气候变暖,候鸟现在每年秋天都会更早地蜕皮

Birds regularly shed and regrow their body and wing feathers in a process, called molting, that is critical for flight, migration, insulation, breeding and survival.

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2025-05-28 01:57:30动物植物
巨齿鲨:巨齿鲨的广泛饮食

Otodus megalodon was the largest predatory fish in Earth's history. Measuring up to 24 meters, it was longer than a truck with a trailer and weighed almost twice as much. Embedded in its jaws were triangular teeth the size of a hand, and its bite had the

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2025-05-28 01:45:07动物植物
试管实验室:在不干扰的情况下监测土壤化学

A team of researchers has developed a portable and automatic laboratory that can monitor soil chemistry in real time—and without expensive components. The aim is to give us easier access to follow the processes that usually take place hidden beneath our f

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2025-05-28 01:32:24动物植物
细菌如何在没有食物的情况下游泳,以及为什么它对气候很重要

Marine bacteria control how much CO2 is stored in the oceans, by swimming after and degrading sinking particles that would otherwise remain stored in the ocean for millennia. Researchers have discovered that some bacteria can swim for several days without

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2025-05-28 01:22:17动物植物
水稻冷适应的表观遗传机制为拉马克理论提供了分子证据

Chinese researchers recently uncovered molecular evidence supporting Lamarckism—a long-debated theory from the early 19th century that acquired characteristics can be inherited.

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2025-05-28 01:07:55动物植物
植物中DNA的快速修复如何保护基因组免受内部威胁

Scientists have uncovered a critical role for rapid DNA repair in maintaining genome stability. A new study reveals that repair of double-strand breaks (DSBs) in nuclear DNA in plants serves as a powerful safeguard against the integration of foreign DNA f

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2025-05-28 00:56:58动物植物
在巴西发现了保护Boheman象鼻虫幼虫免受野火高温的胆囊

A team of ecologists and entomologists affiliated with several institutions in Brazil, working with a colleague from Mexico, has observed the first instance of galls providing protection against fire to gall-inducing Boheman weevil larvae. In their paper

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2025-05-28 00:45:39动物植物
如果一棵树倒在森林里,那是松树吗?研究人员现在可以做出很好的猜测

If you're wondering why squirrels seem to vastly outnumber raccoons—or why certain car brands dominate city streets—a team of University of Virginia researchers may be able to help.

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2025-05-28 00:33:00动物植物
一些入侵物种的成本可能比我们想象的高16倍

From river-clogging plants to disease-carrying insects, the direct economic cost of invasive species worldwide has averaged about $35 billion a year for decades, researchers said Monday.

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2025-05-28 00:19:37动物植物
对于许多岛屿物种来说,下一个热带气旋可能是它们的最后一个

When a major cyclone tears through an island nation, all efforts rightly focus on saving human lives and restoring livelihoods. However, these storms have permanent consequences for other species that are often forgotten.

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2025-05-28 00:08:41动物植物
街头智慧:库珀的鹰利用人行横道信号伏击城市猎物

A University of Tennessee researcher documented an immature Cooper's hawk using vehicle traffic and pedestrian signal patterns as concealment during hunting behavior at a suburban intersection.

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2025-05-27 23:54:47动物植物
一项为期五年的研究表明,黑猩猩用石头砸树是一种交流方式

A recent study by behavioral biologists from Wageningen University & Research and the German Primate Research Center has uncovered a remarkable phenomenon among wild chimpanzees in West Africa: the use of stones to produce sound, presumably as a form

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