Results 11 to 20 of about 496,670 (387)

The Messel Pit: Window into a Greenhouse World [PDF]

Geoconservation Research, 2021
Anthropogenic climate change may result, within 200 years, in warm and equable climatic conditions not experienced on Earth for tens of millions of years. Ancient ecosystems under such “greenhouse” conditions may be seen as natural experiments, and their
Krister Smith
doaj   +1 more source

Fossils improve phylogenetic analyses of morphological characters

bioRxiv, 2020
Fossils provide our only direct window into evolutionary events in the distant past. Incorporating them into phylogenetic hypotheses of living clades can help elucidate macroevolutionary patterns and processes, such as ancestral states and ...
N. M. Koch, R. Garwood, L. Parry
semanticscholar   +1 more source

Microscopic recognition of micro fossils in carbonate rocks based on convolutional neural network

Shiyou shiyan dizhi, 2021
The identification of microfossils in carbonate rocks with thin-section observation is of great significance for the study of sedimentary environment, but the traditional method by manual identification is highly experience required and is greatly ...
Xiaolu YU, Kai YE, Chongjiao DU, Hanning GONG, Zhongliang MA   +4 more
doaj   +1 more source

Rates and Rocks: Strengths and Weaknesses of Molecular Dating Methods

Frontiers in Genetics, 2020
I present here an in-depth, although non-exhaustive, review of two topics in molecular dating. Clock models, which describe the evolution of the rate of evolution, are considered first.
Stéphane Guindon
doaj   +1 more source

The palaeontological collection stored in the Department of Geology of the National Museum of Natural History NAS of Ukraine as a scientific heritage

Geo&Bio, 2019
The palaeontological collection of the Geological Department of the National Museum of Natural History NAS of Ukraine (NMNH NASU) is among the most valuable objects of the national scientific and cultural heritage. The article presents a brief analytical
G. V. Anfimova, V. P. Grytsenko, K. I. Derevska, K. V. Rudenko   +3 more
doaj   +1 more source

Variation and process of life history evolution in insular dwarfism as revealed by a natural experiment

Frontiers in Earth Science, 2023
Islands are a classic focus for evolutionary studies. One topic of great interest has been the evolution of “dwarfs,” significantly smaller island mammals relative to their continental counterparts.
Shoji Hayashi, Shoji Hayashi, Mugino O. Kubo, Marcelo R. Sánchez-Villagra, Hiroyuki Taruno, Masako Izawa, Masako Izawa, Tsunehiro Shiroma, Takayoshi Nakano, Masaki Fujita   +9 more
doaj   +1 more source

Where are the Fossils of the First Galaxies? I. Local Volume Maps and Properties of the Undetected Dwarfs [PDF]

, 2010
We present a new method for generating initial conditions for LCDM N-body simulations which provides the dynamical range necessary to follow the evolution and distribution of the fossils of the first galaxies on Local Volume, 5-10 Mpc, scales.
Babul, Begum, Belokurov, Belokurov, Bovill, Bullock, Cole, de Jong, Diemand, Efstathiou, Eisenstein, Frebel, Frebel, Geha, Giovanelli, Gnedin, Gnedin, Irwin, Kallivayalil, Kirby, Kirby, Klypin, Knollmann, Koposov, Kormendy, Kravtsov, Majewski, Martinez, Massimo Ricotti, Mia S. Bovill, Navarro, Norris, Peñarrubia, Peñarrubia, Quinn, Ricotti, Ricotti, Ricotti, Ricotti, Ricotti, Saigo, Shetrone, Shull, Simon, Simon, Susa, Tollerud, Tolstoy, Tormen, van der Marel, Venkatesan, Walker, Walsh, Walsh, Willman, Willman, Willman, Wise, Wolf, Zucker, Zucker   +60 more
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The Clicking Elateroidea from Chinese Mesozoic Deposits (Insecta, Coleoptera)

Insects, 2020
Recent molecular studies have suggested that the clicking beetle families Elateridae, Eucnemidae, Throscidae, and Cerophytidae evolved in the Jurassic and diversified in the Cretaceous.
Jyrki Muona, Huali Chang, Dong Ren
doaj   +1 more source

Analisis Sisa Gajah Dari Kecamatan Tamban, Kabupaten Batola (Kalimantan Selatan): Suatu Pengumuman

Berkala Arkeologi, 1989
Dalam tahun 1987 Pusat Penelitian Arkeologi Nasio­nal diminta untuk mengoreksi suatu temuan yang baru dilakukan oleh Bidang Permuseuman Sejarah dan Purba­kala Kantor Wilayah Departemen Pendidikan dan Kebu­dayaan Propinsi Kalimantan Selatan.
Rokus Due Awe
doaj   +1 more source

Teaching Paleontology [PDF]

, 1995
This guide is designed to be used by teachers as an aid for teaching principles of fossils and past life to elementary school students. The activities and labs provided include topics such as fossilization, sedimentation, trace fossils, the importance of

core   +2 more sources