理学 >>> 数学 信息科学与系统科学 物理学 化学 天文学 地球科学总论 大气科学 地球物理学 地理学 地质学 水文学 海洋科学 生物学 科学技术史
搜索结果: 1-15 共查到理学 Fossils相关记录28条 . 查询时间(0.058 秒)
Dinosaur paleontologists are detectives, piecing together clues from fragments of fossils to decipher what a whole organism looked like, how it moved, and how it behaved. While even a preschooler coul...
The asteroid impact 66 million years ago that ushered in a mass extinction and ended the dinosaurs also killed off many of the plants they relied on for food. Fossil leaf assemblages from Patagonia su...
New research published in the Journal of Vertebrate Paleontology describes a fossil family that illuminates the origin of perissodactyls -- the group of mammals that includes horses, rhinos ...
Newly unearthed, well-preserved conifer fossils from Patagonia, Argentina, show that an endangered and celebrated group of tropical West Pacific trees has roots in the ancient supercontinent that once...
Fossils may need air to form(图)     Fossils  air to form       2019/11/15
Some of the world's most exquisite fossil beds were formed millions of years ago during time periods when Earth's oceans were largely without oxygen.That association led paleontologists to believe tha...
Exceedingly well-preserved bird fossil specimens dating 50 million years represent a new species that is a previously unknown relative of the modern-day ostrich, according to a new paper co-authored b...
On an arid plateau in the Andes Mountains of southern Bolivia, a Case Western Reserve University researcher flagged what turned out to be the fossil remains of a tortoise nearly five feet long—a find ...
Nearly 100 fossil species found in a flooded cave on Abaco Island in the Bahamas reveal a story of persistence against all odds--at least until the time humans stepped foot on the islands.Researchers ...
In this short note I have tried to make clear the issues surrounding a recent discussion on changing-radius paleobiogeographical problems of the Pacific Ocean biotic distribution. It is stressed that ...
The balmy islands of Seychelles couldn’t feel farther from Antarctica, but their fossil corals could reveal much about the fate of polar ice sheets.About 125,000 years ago, the average global temperat...
COLUMBIA, Mo. – A new study from University of Missouri and Virginia Tech researchers is challenging accepted ideas about how ancient soft-bodied organisms become part of the fossil record. ...
EUGENE, Ore. — Nov. 18, 2014 — Leave it to long-dead short-tailed shrew and flying squirrels to outfox climate-modelers trying to predict future habitats.
Based on a thorough examination of museum and field Climactichnites specimens, two species of this trace, which is restricted to North America, are recognized, each representing a unique behavioral va...
Based on a thorough examination of museum and field Climactichnites specimens, two species of this trace, which is restricted to North America, are recognized, each representing a unique behavioral va...
Based on a thorough examination of museum and field Climactichnites specimens, two species of this trace, which is restricted to North America, are recognized, each representing a unique behavioral va...

中国研究生教育排行榜-

正在加载...

中国学术期刊排行榜-

正在加载...

世界大学科研机构排行榜-

正在加载...

中国大学排行榜-

正在加载...

人 物-

正在加载...

课 件-

正在加载...

视听资料-

正在加载...

研招资料 -

正在加载...

知识要闻-

正在加载...

国际动态-

正在加载...

会议中心-

正在加载...

学术指南-

正在加载...

学术站点-

正在加载...