18+污漫画,亚洲国产港台日韩欧美三级电影网,办公室扒开奶罩揉吮奶明星,爱爱电影爱情影院网,斗破苍穹 小说免费阅读全集,人妻洗澡被强伦姧完整,打扑克牌又疼又叫视频软件,亚洲,日韩,aⅴ在线欧美,寂寞少妇扒开双腿猛烈进入免费看

www.cdcqgg.com

Earliest Sign of Human Habitation in East Asia Found in China


Chinese and American fossil hunters say stone implements discovered in northern China are the earliest evidence of human habitation in eastern Asia.

The tools are around 1.36 million years old, which also indicates early man ventured farther north earlier than previously thought, they report in the British scientific journal Nature.

The artifacts comprise scrapers and borers found in the Nihenwan Basin, near the Sanggan River in northern China, an area of thick lake silt that has been a treasure trove of mammal fossils.

A team from Chinese Academy of Sciences, the Smithsonian Institution in Washington and California Polytechnic State University carried out a dating analysis of the soils.

Their principal technique was magnetostratigraphy, which is based on the idea that the Earth's magnetic field changes directions at irregular intervals.

It is possible to date the strata of ancient geological deposits, such as lava and mud, according to the magnetic field that prevailed when the layer solidified.

The Nihenwan Basin lies on the latitude of 40 degrees north, which suggests that Homo erectus -- an early forebear of modern Man -- was quite resilient and able to withstanding climate change.

At the time, the world's climate was going through a cycle of variability, in which northern China suffered spells of aridity.

(China Daily 09/28/2001)

In This Series

Fossilized Marine Growth Discovered in Xinjiang

Large Animal Skull Fossil Found in Guizhou

Five Million Year Old Fossils Found

Scientists Ascertain Earliest Feather Appears on Dinosaurs

Ancient Chinese Used Hard Writing Tools

References

Archive

Web Link


Copyright ? 2001 China Internet Information Center. All Rights Reserved
E-mail: [email protected] Tel: 86-10-68326688