Results 51 to 60 of about 5,477 (253)

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

Simulated east–west differences in F-region peak electron density at Far East mid-latitude region

Earth, Planets and Space, 2020
Using TIME3D-IGGCAS model, we simulated the east–west differences in F-region peak electron density (NmF2) in the Far East mid-latitude region near the longitudinal sectors with very clear zonal variations of geomagnetic declination, and mainly analyzed ...
Zhipeng Ren, Biqiang Zhao, Weixing Wan, Libo Liu, Xing Li, Tingting Yu   +5 more
doaj   +1 more source

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

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

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

Osteohistology of two phorusrhacids reveals uninterrupted growth strategy

The Anatomical Record, EarlyView.
Abstract Phorusrhacidae were apex predators that primarily dominated South America ecosystems for at least 40 million years with their imposing size and predatory lifestyle—yet some aspects of their biology remain poorly understood. Osteohistology is a tool for understanding growth dynamics and biomechanical adaptations.
Lotta Dreyer, Christian Cooper, Jingmai O'Connor   +2 more
wiley   +1 more source

Nasal soft‐tissue anatomy of Triceratops and other horned dinosaurs

The Anatomical Record, EarlyView.
Abstract Although ceratopsid dinosaurs possess a characteristically hypertrophied narial region, soft‐tissue anatomy associated with such a skeletal structure and their biological significance remain poorly understood. The present study provides the first comprehensive hypothesis on the soft‐tissue anatomy in the ceratopsid rostrum based on the Extant ...
Seishiro Tada, Takanobu Tsuihiji, Hiroki Ishikawa, Noriyuki Wakimizu, Soichiro Kawabe, Kodai Sakane   +5 more
wiley   +1 more source

Statistical Geochemical Constraints on Present-day Water Outgassing as a Source of Secondary Atmospheres on the TRAPPIST-1 Exoplanets

The Planetary Science Journal
The TRAPPIST-1 planetary system is observationally favorable for studying if planets orbiting M stars can retain atmospheres and host habitable conditions.
Trent B. Thomas, Victoria S. Meadows, Joshua Krissansen-Totton, Megan T. Gialluca, Nicholas F. Wogan, David C. Catling   +5 more
doaj   +1 more source

The Geology and Planetary mapping winter school

, 2021
In 2021, between 1-5 February, theUniversity of Padua coordinated the 1st edition of theGeology and Planetary mapping virtual school(https://www.planetarymapping.eu/), which involvedmore than 150 participants spread all over the world andmore than 50 instructors from at least 9 Europeaninstitutions.In planetary exploration programs, geological mapsare ...
Massironi, Matteo, Rossi, Angelo Pio, Penasa, Luca, Pozzobon, Riccardo, Tognon, Gloria, Wright, Jack, van Der Bogert, Carolyn, Zambon, Francesca, Galluzzi, Valentina, Caravaca, Gwénaël, Le Mouélic, Stéphane   +10 more
openaire   +2 more sources