搜索结果: 1-15 共查到“理学 Ancient”相关记录111条 . 查询时间(0.109 秒)
Like ancient mariners, ancestors of Prochlorococcus microbes rode out to sea on exoskeleton particles（图）
原绿球菌 微生物 外骨骼颗粒 浮游植物 几丁质颗粒
2023/6/21
Throughout the ocean, billions upon billions of plant-like microbes make up an invisible floating forest. As they drift, the tiny organisms use sunlight to suck up carbon dioxide from the atmosphere. ...
Swirling around the planet’s equator, the rings of Saturn are a dead giveaway that the planet is spinning at a tilt. The belted giant rotates at a 26.7-degree angle relative to the plane in which it o...
On the evening of Dec. 12, 2021, Cornell astronomers Gordon Stacey and Thomas Nikola were dangerously short on time. They’d been awake for nearly 24 hours, with another all-nighter ahead of them.
Comet 67P/Churyomov-Gerasimenko – arguably the most-studied comet in history – has yielded a cosmic surprise: It emits molecular oxygen drawn from its nucleus.
Researchers have found that the extinction at the end of the Permian period coincided with a sudden spike and subsequent drop in the ocean's oxygen content.
Ancient ostrich eggshell reveals new evidence of extreme climate change thousands of years ago
extreme climate change ancient ostrich eggshell isotope amino acid evolution of species
2021/8/4
Evidence from an ancient eggshell has revealed important new information about the extreme climate change faced by human early ancestors.
Astronomers detect dark matter halo around ancient dwarf galaxy（图）
Astronomers detect dark matter halo ancient dwarf galaxy
2021/3/5
The Milky Way is surrounded by dozens of dwarf galaxies thought to be relics of the first galaxies in the universe. Among the most primitive of these galactic fossils is Tucana II -- an ultrafaint dwa...
Shark teeth offer clues to ancient climate change（图）
Shark teeth clues ancient climate change
2021/2/5
A character in a great white shark movie said that all sharks do is "swim and eat and make little sharks."It turns out they do much more than that. Sharks have roamed Earth's oceans for more than 400 ...
中国地质大学科学技术发展院胡家铭（硕士生），盛桂莲*等，环境学院/BGEG国家重点实验室，Proceedings of the Royal Society B: Biological Sciences (2021), Ancient mitochondrial genomes from Chinese cave hyenas provide insights into the evolutionary history of the genus Crocuta（图）
中国；洞鬣狗；古线粒体；基因组；斑鬣狗属；演化历史
2021/10/15
2021年1月27日，中国地质大学赖旭龙教授领导的古DNA研究团队与德国波兹坦大学、丹麦哥本哈根大学等单位合作研究的成果“Ancient mitochondrial genomes from Chinese cave hyenas provide insights into the evolutionary history of the genus Crocuta（中国洞鬣狗古线粒体基因组为斑鬣狗...
Scientists have discovered an ancient lakebed deep beneath the Greenland ice（图）
Scientists ancient lakebed deep beneath Greenland ice
2020/11/20
Scientists have detected what they say are the sediments of a huge ancient lakebed sealed more than a mile beneath the ice of northwest Greenland -- the first-ever discovery of such a sub-glacial feat...
Research links ancient Southeast Asia megadrought to drying in Africa（图）
ancient Southeast Asia megadrought drying in Africa
2020/9/11
Evidence found in caves in Laos helps tell a story about a connection between the end of the Green Sahara, when heavily vegetated Northern Africa became a hyper-arid landscape, and a previou...
Ancient Maya reservoirs contained toxic pollution（图）
Ancient Maya reservoirs contained toxic pollution
2020/7/17
Findings from research conducted by a University of Cincinnati team suggest that droughts in the ninth century along with pollution of reservoirs likely contributed to the depopulation and e...
Eruption of Alaska's Okmok volcano linked to period of extreme cold in ancient Rome（图）
Eruption Alaska Okmok volcano linked period extreme cold ancient Rome
2020/7/10
An international team of scientists has found evidence connecting an unexplained period of extreme cold in ancient Rome with an unlikely source: a massive eruption of Alaska's Okmok volcano, located o...
Eruption of Alaska's Okmok volcano linked to period of extreme cold in ancient Rome（图）
Eruption Alaska Okmok volcano linked period extreme cold ancient Rome
2020/7/3
An international team of scientists has found evidence connecting an unexplained period of extreme cold in ancient Rome with an unlikely source: a massive eruption of Alaska's Okmok volcano, located o...
Ancient teeth from Peru hint that now-extinct monkeys crossed the Atlantic from Africa（图）
Ancient teeth Peru now-extinct monkeys crossed Atlantic Africa
2020/4/17
Four fossilized monkey teeth discovered deep in the Peruvian Amazon provide new evidence that more than one group of ancient primates journeyed across the Atlantic Ocean from Africa, according to work...