搜索结果: 1-15 共查到“国际动态 2.8 million”相关记录179条 . 查询时间(0.088 秒)
U.K. backs advanced reactor future with ￡300 million for HALEU enrichment（图）
先进反应堆 HALEU浓缩 能源安全
2024/2/1
The United Kingdom’s Department for Energy Security and Net Zero announced plans on January 7 to invest ￡300 million (about $383 million) to build a high-assay low-enriched uranium (HALEU) enrichment ...
Weather surveillance radar data shows 45 million insects taking flight over brightly lit city（图）
Weather surveillance radar data 45 million insects flight lit city
2021/4/16
The expansion of artificial night lights globally has had important impacts on animal behavior and health. A new study led by researchers at the University of Oklahoma on the effects of brig...
Geoscientists reconstruct 6.5 million years of sea level in the Western Mediterranean（图）
Geoscientists reconstruct 6.5 million years sea level Western Mediterranean
2021/2/5
The pressing concern posed by rising sea levels has created a need for scientists to predict how quickly the oceans will rise in coming centuries, researchers say. To gain insight into future ice shee...
Fossil evidence of 'hibernation-like' state in 250-million-year-old Antarctic animal（图）
Fossil hibernation-like state 250-million-year-old Antarctic animal
2020/9/4
Hibernation is a familiar feature on Earth today. Many animals -- especially those that live close to or in polar regions -- hibernate to get through tough winter months when food is scarce, temperatu...
Deep sea microbes dormant for 100 million years are hungry and ready to multiply（图）
Deep sea microbes dormant 100 million years hungry ready to multiply
2020/7/31
For decades, scientists have gathered ancient sediment samples from below the seafloor to better understand past climates, plate tectonics and the deep marine ecosystem. In a new study published in...
Lightning strikes more than 100 million times per year in the tropics（图）
Lightning strikes 100 million times per year tropics
2020/7/31
Scientists at the Smithsonian Tropical Research Institute in Panama have published dramatic maps showing the locations of lightning strikes across the tropics.Based on ground and satellite d...
300-million-year-old fish resembles a sturgeon but took a different evolutionary path（图）
300-million-year-old resembles sturgeon different evolutionary path
2020/7/3
Sturgeon, long-lived, bottom-dwelling fish, are often described as living fossils. Their form has remained relatively constant, despite hundreds of millions of years of evolution.In a National Sc...
Volcanic coal-burning in Siberia led to climate change 252 million years ago（图）
Volcanic coal-burning Siberia led climate change 252 million years ago
2020/6/19
A team of researchers led by Arizona State University geoscientist Linda Elkins-Tanton has provided the first direct evidence that extensive coal burning in Siberia was a cause of the Permo-...
Researchers discover 66-million-year-old badger-like animal（图）
Researchers 66-million-year-old badger-like animal
2020/5/9
In evolutionary terms, islands are the stuff of weirdness. It is on islands where animals evolve in isolation, often for millions of years, with different food sources, competitors, predators, and par...
Unraveling arthropod genomic diversity over 500 million years of evolution（图）
arthropod genomic diversity 500 million years evolution
2020/2/20
Comparative analyses by scientists at the Swiss Institute of Bioinformatics and other institutions of 76 arthropod species spanning 500 million years of evolution reveal genomic changes that point to ...
Scientists find oldest-known fossilized digestive tract — 550 million years（图）
Scientists oldest-known fossilized digestive tract 550 million years
2020/1/19
A 550-million-year-old fossilized digestive tract found in the Nevada desert could be a key to understanding the early history of animals on Earth.More than a half-billion years ago, life on Earth con...
Microplastics million times more abundant in the ocean than previously thought（图）
Microplastics million times more abundant ocean previously thought
2019/12/20
Nothing seems safe from plastic contamination. A new study by NSF-funded researchers at the Scripps Institution of Oceanography suggests there could be a million times more pieces of plastic in the oc...
Mass extinction of land and sea biodiversity 250 million years ago not simultaneous（图）
Mass extinction land sea biodiversity 250 million years ago simultaneous
2019/12/13
Some 250 million years ago, simultaneous mass extinctions of marine and terrestrial life occurred in an event known as the End-Permian. Or so scientists believed.New research led by Colby College geol...
3.8-million-year-old fossil cranium unveils more about human ancestry（图）
3.8-million-year-old fossil cranium human ancestry
2019/10/18
In 2016, researchers working in the Afar region of Ethiopia, some 35 miles away from Hadar, the region in which "Lucy," the famous Australopithecus afarensis human ancestor, was found, discovered a ne...
Six million years ago, atmospheric shifts led to increased diversity of grassland mammals（图）
Six million years ago atmospheric shifts grassland mammals
2019/10/30
Six million years ago, grass-eating mammals became more diverse in South America. Shifts in tropical atmospheric circulation known as Hadley circulation led to changes in climate and vegetation, espec...