Results 11 to 20 of about 509,485 (382)
A Field Guide to Finding Fossils on Mars [PDF]
Journal of Geophysical Research - Planets, 2018 The Martian surface is cold, dry, exposed to biologically harmful radiation and apparently barren today. Nevertheless, there is clear geological evidence for warmer, wetter intervals in the past that could have supported life at or near the surface. This
Sean McMahon +9 more
openalex +2 more sources
Possible poriferan body fossils in early Neoproterozoic microbial reefs
Nature, 2021 Molecular phylogeny indicates that metazoans (animals) emerged early in the Neoproterozoic era1, but physical evidence is lacking. The search for animal fossils from the Proterozoic eon is hampered by uncertainty about what physical characteristics to ...
E. Turner
semanticscholar +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
Paleontological Heritage and its Conservation in the UNESCO European Geoparks. [PDF]
Geoconservation Research, 2021 Together, places of scientific, historical or cultural significance within a region and the artefacts uncovered therefrom and displayed in museums and collections make up the total heritage of the region in question. Seemingly lifeless places and objects
Dan Grigorescu
doaj +1 more source
Étude de collections de paléontologie
CeROArt : Conservation, Exposition, Restauration d'Objets d'Art, 2013 Paleontology Collections include many fossils containing sulphides, such as pyrite which is a widespread iron sulphide. When exposed to the open air, these sulphides are prone to oxidation and give rise to remarkable efflorescence that hide the fossil ...
Giliane Pauline Odin +2 more
doaj +1 more source
Die Paläogeographie und Fazien der kambrischen Ablagerungen im Bereich der osteuropäischen Plattform [PDF]
Bulletin of the Geological Society of Finland, 1984 Cambrian deposits composed of marine ‒ terrigenous sediments having paleontologic characteristics are widely distributed throughout the Baltic region (Tables 1 and 2). The thickness of the Cambrian deposits exeed 250 m.
V. Korkutis
doaj +1 more source
Considérations ontogénétiques et phylogénétiques concernant l’origine de la parole
Revue de Primatologie, 2011 The end of the XXth century and the beginning of this century saw a reorganization of the researches in the field of speech and language emergence (SLE). Naturalism is the kernel of this new approach.
Louis-Jean Boë +8 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 +60 more
core +1 more source
, 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
The First Galaxies and the Likely Discovery of their Fossils in the Local Group [PDF]
, 2009 In cold dark matter cosmologies, small mass halos outnumber larger mass halos at any redshift. However, the lower bound for the mass of a galaxy is unknown, as are the typical luminosity of the smallest galaxies and their numbers in the universe.
Ricotti, Massimo
core +3 more sources