Results 61 to 70 of about 10,100 (298)

Planetary science : a lunar perspective [PDF]

, 1982
An interpretative synthesis of current knowledge on the moon and the terrestrial planets is presented, emphasizing the impact of recent lunar research (using Apollo data and samples) on theories of planetary morphology and evolution.Stuart Ross TaylorThe
Taylor, Stuart Ross, 1925-
core  

A detailed redescription of a skeletally immature ‘Redondasaurus’ suggests ontogenetic transformations in the taxon mirror phytosaurian morphological evolution

The Anatomical Record, EarlyView.
Abstract The study of morphological evolution is fundamentally tied to ontogeny, yet studies of these heterochronic processes in the fossil record are rare. Fossils belonging to an ontogenetic series are difficult to assign to an ontogenetic stage due to inconsistent proxies for skeletal ages, challenging to taxonomically assign due to morphological ...
Erika R. Goldsmith, Michelle R. Stocker
wiley   +1 more source

Simulating Science Operations for a Joint Rover-helicopter Mission Architecture in a Mars Analog Setting

The Planetary Science Journal
Aerial platforms can explore planetary surfaces without the mobility limitations of rovers and landers. Inspired by the recent successes and challenges of NASA’s IngenuAity Mars Helicopter, the Rover-Aerial Vehicle Exploration Network project explored ...
Kathryn M. Stack, Raymond Francis, Fred J. Calef III, Samantha J. Gwizd, Jeffrey F. Schroeder, Joana R. C. Voigt, Thorsteinn Kristinsson, Peter Schroedl, Jahnavi Shah, Matthew Varnam, Catherine D. Neish, Reid P. Perkins, Sashank Vanga, Michael S. Bramble, Andrea Donnellan, Jeffrey T. Osterhout, Michael Tuite, Brett B. Carr, Christopher W. Hamilton   +18 more
doaj   +1 more source

Planetary stewardship in an urbanizing world: beyond city limits [PDF]

, 2012
Cities are rapidly increasing in importance as a major factor shaping the Earth system, and as such must take corresponding responsibility. With currently over half of the world population, cities are supported by resources originating from primarily ...
Elmqvist, Thomas, Lorraine Sugar, Svedin, U., Elmqvist, T., Mbow, Cheikh, Sinclair, Paul, Stafford-Smith, M., Shobhakar, Dhakal, Cheikh Mbow, Steffen, Will, Alfsen, Christine, Neda Farahbakhshazad, Uno Svedin, Gaffney, O., Biermann, F.H.B., Dearing, J.A., McMichael, A.J., Stafford Smith, M., Ninad R. Bondre, Adbullah, Saiful Arif, Haberl, H., Crumley, Carole, Pinho, Patricia Fernanda, Sinclair, Paul,, Biermann, Frank, McMichael, Anthony J., Olsson, P., Broadgate, Wendy J., Morais, J., Haberl, Helmut, Joao M. F. deMorais, Christine Alfsen, Seitzinger, Sybil P., Farahbakhshazad, N., Svedin, Uno, Patricia Fernanda Pinho, Deutsch, Lisa, Dearing, John A., Olsson, Per, Lavorel, S., deMorais, Joao M.F., Frank Biermann, Saiful Arif Abdullah, Sugar, Lorraine, Will Steffen, Crumley, Carole L.,, Dhakal, S., Smith, Mark Stafford, Steffen, W., Biermann, F., Dhakal, Shobhakar, Abdullah, Saiful Arif, Per Olsson, Seto, K.C., Crumley, C.L., Shobhakar Dhakal, Pinho, P, Bondre, Nanid R., Bondre, N.R., deMorais, Joao M. F., Farahbakhshazard, N., Pinho, P., Gaffney, Owen, Wendy J. Broadgate, Paul Sinclair, Deutsch, L., Karen C. Seto, Broadgate, W.J., Sybil P. Seitzinger, Lavorel, Sandra, Abdullah, S.A., Seitzinger, S.P., Alfsen, C., Lisa Deutsch, Farahbakhshazad, Neda, Seto, Karen C., Owen Gaffney, Sandra Lavorel, Sugar, L., Helmut Haberl, Bondre, Ninad R., John A. Dearing, Mbow, C., Sinclair, P., Crumley, C., Demorais, J.M., Thomas Elmqvist, Pinho, P.F., Mbow, Cheik, Anthony J. McMichael, Carole L. Crumley, Mark Stafford Smith   +91 more
core   +1 more source

Histology and fossil diagenesis of a pterosaur tooth from the Crato Formation (Lower Cretaceous of Brazil)

The Anatomical Record, EarlyView.
Abstract Pterosaur dental biology remains poorly understood despite its importance for comprehending feeding strategies and flight adaptations. Here, we present the first comprehensive histological analysis of an ornithocheiriform pterosaur tooth from the Lower Cretaceous Crato Formation (Santana Group, Northeast Brazil).
Tito Aureliano, Matheus P. S. Rocha, Francisco P. Lima‐Filho, Aline M. Ghilardi   +3 more
wiley   +1 more source

Field Geology/Processes

, 1995
The field geology/processes group examined the basic operations of a terrestrial field geologist and the manner in which these operations could be transferred to a planetary lander.
Singer, Robert B., Jakeš, Petr, Saunders, Stephen, Ryder, Graham, Allen, Carlton, Singer, Robert, Allen, Carlton C., Jaumann, Ralf, Moses, Stewart, Marshall, John   +9 more
core  

An unusual titanosaur axis from the Upper Cretaceous of Brazil and its significance for sauropod anatomy and systematics

The Anatomical Record, EarlyView.
Abstract The Upper Cretaceous São José do Rio Preto Formation (Bauru Group, southeastern Brazil) has yielded a fragmentary but taxonomically diverse record of titanosaur sauropods, although elements from cervical series remain scarce. Here, we describe a nearly complete sauropod axis from the Vila Ventura Paleontological Area, representing an uncommon ...
Bruno A. Navarro, Jeffrey A. Wilson Mantilla, Jhonata H. A. Martins, Fabiano V. Iori, Leonardo S. Paschoa, Alberto B. Carvalho, Joseli M. Piranha, Hussam Zaher   +7 more
wiley   +1 more source

Crater Retention Timescales of Brain Coral Terrain Record Past Climatic Change on Mars

The Planetary Science Journal
Glacial landforms on Mars offer an opportunity to decipher the planet’s recent climate history. We used crater size frequency distributions of brain coral terrain on concentric crater fill, lobate debris aprons, and lineated valley fill, all of which ...
Alexander M. Morgan, Eldar Z. Noe Dobrea, Kyle A. Pearson, Alphan Altinok   +3 more
doaj   +1 more source

Direct structural evidence of Indian continental subduction beneath Myanmar

Nature Communications, 2020
Indian continental subduction can explain crustal deformation, magmatic activity and uplift of the Tibetan Plateau following collision, however, the nature of the Indian subducting slab beneath Myanmar and the related tectonic regime remain unclear. Here,
Tianyu Zheng, Yumei He, Lin Ding, Mingming Jiang, Yinshuang Ai, Chit Thet Mon, Guangbing Hou, Kyaing Sein, Myo Thant   +8 more
doaj   +1 more source

Comparative cranial biomechanics reveal macroevolutionary trends in theropod dinosaurs, with emphasis on Tyrannosauroidea

The Anatomical Record, EarlyView.
Abstract Tyrannosaurus is viewed as a model organism in vertebrate paleontology, with numerous studies analyzing its feeding biomechanics. Nonetheless, the evolution of this feeding performance has been under‐addressed in Tyrannosauroidea, especially in basal tyrannosauroids. Here we used muscle‐force reconstruction and finite element analysis (FEA) to
Evan Johnson‐Ransom, Paul Gignac, Daniel E. Barta, Ryan N. Felice, Eric Snively   +4 more
wiley   +1 more source