GSTDTAP

浏览/检索结果: 共24条,第1-10条 帮助

已选(0)清除 条数/页:   排序方式:
Inner Workings: Making headway with the mysteries of life’s origins 期刊论文
Proceedings of the National Academy of Science, 2021
作者:  Adam Mann
收藏  |  浏览/下载:2/0  |  提交时间:2021/04/20
Crewed launch deepens ties between NASA and SpaceX 期刊论文
Science, 2020
作者:  Adam Mann
收藏  |  浏览/下载:2/0  |  提交时间:2020/05/25
Monumental architecture at Aguada Fenix and the rise of Maya civilization 期刊论文
NATURE, 2020
作者:  Bedding, Timothy R.;  Murphy, Simon J.;  Hey, Daniel R.;  Huber, Daniel;  Li, Tanda;  Smalley, Barry;  Stello, Dennis;  White, Timothy R.;  Ball, Warrick H.;  Chaplin, William J.;  Colman, Isabel L.;  Fuller, Jim;  Gaidos, Eric;  Harbeck, Daniel R.;  Hermes, J. J.;  Holdsworth, Daniel L.;  Li, Gang;  Li, Yaguang;  Mann, Andrew W.;  Reese, Daniel R.;  Sekaran, Sanjay;  Yu, Jie;  Antoci, Victoria;  Bergmann, Christoph;  Brown, Timothy M.;  Howard, Andrew W.;  Ireland, Michael J.;  Isaacson, Howard;  Jenkins, Jon M.;  Kjeldsen, Hans;  McCully, Curtis;  Rabus, Markus;  Rains, Adam D.;  Ricker, George R.;  Tinney, Christopher G.;  Vanderspek, Roland K.
收藏  |  浏览/下载:30/0  |  提交时间:2020/07/03

Archaeologists have traditionally thought that the development of Maya civilization was gradual, assuming that small villages began to emerge during the Middle Preclassic period (1000-350 bc  dates are calibrated throughout) along with the use of ceramics and the adoption of sedentism(1). Recent finds of early ceremonial complexes are beginning to challenge this model. Here we describe an airborne lidar survey and excavations of the previously unknown site of Aguada Fenix (Tabasco, Mexico) with an artificial plateau, which measures 1,400 m in length and 10 to 15 m in height and has 9 causeways radiating out from it. We dated this construction to between 1000 and 800 bc using a Bayesian analysis of radiocarbon dates. To our knowledge, this is the oldest monumental construction ever found in the Maya area and the largest in the entire pre-Hispanic history of the region. Although the site exhibits some similarities to the earlier Olmec centre of San Lorenzo, the community of Aguada Fenix probably did not have marked social inequality comparable to that of San Lorenzo. Aguada Fenix and other ceremonial complexes of the same period suggest the importance of communal work in the initial development of Maya civilization.


Lidar survey of the Maya lowlands uncovers the monumental site of Aguada Fenix, which dates to around 1000-800 bc and points to the role of communal construction in the development of Maya civilization.


  
To improve weather and climate models, researchers are chasing atmospheric gravity waves 期刊论文
PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF AMERICA, 2019, 116 (39) : 19218-19221
作者:  Mann, Adam
收藏  |  浏览/下载:3/0  |  提交时间:2019/11/27
ASTRONOMY NASA probe to make all-sky infrared map 期刊论文
SCIENCE, 2019, 363 (6429) : 803-803
作者:  Mann, Adam
收藏  |  浏览/下载:0/0  |  提交时间:2019/11/27
Large galaxy found lurking on the Milky Way's far side 期刊论文
SCIENCE, 2018, 362 (6416) : 737-737
作者:  Mann, Adam
收藏  |  浏览/下载:0/0  |  提交时间:2019/11/27
Hunting for microbial life throughout the solar system 期刊论文
PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF AMERICA, 2018, 115 (45) : 11348-11350
作者:  Mann, Adam
收藏  |  浏览/下载:0/0  |  提交时间:2019/11/27
ASTRONOMY Optical interferometers sharpen views of the sky 期刊论文
SCIENCE, 2018, 361 (6397) : 12-13
作者:  Mann, Adam
收藏  |  浏览/下载:0/0  |  提交时间:2019/11/27
Life after the asteroid apocalypse 期刊论文
PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF AMERICA, 2018, 115 (23) : 5820-5823
作者:  Mann, Adam
收藏  |  浏览/下载:0/0  |  提交时间:2019/11/27
B612 plans asteroid hunt with fleet of small satellites 期刊论文
SCIENCE, 2018, 360 (6391) : 842-843
作者:  Mann, Adam
收藏  |  浏览/下载:0/0  |  提交时间:2019/11/27