Results 71 to 80 of about 1,235,793 (297)

Particle Dynamics within the Habitable Zone of Extra Solar Planets

, 2005
<p>The orbital stability properties of terrestrial planets within the habitable zone of the star HD4208 (Vogt et al. 2001) is investigated. The habitable zone is determined from Kasting et al.
Hinse, Tobias Cornelius
core   +1 more source

Redescription of the Triassic cynodont Cistecynodon parvus and reassessment of its phylogeny

The Anatomical Record, EarlyView.
Abstract Cynodontia is an important subclade of Therapsida that first occurred in the late Permian. It includes extinct subclades which are the non‐mammaliaform cynodonts and Mammaliaformes, with the latter ultimately giving rise to crown mammals. The systematics of non‐mammaliaform cynodonts has been extensively studied and is relatively well‐resolved,
Erin S. Lund, Frederik P. Wolvaardt, Roger M. H. Smith, Jaganmoy Jodder, Julien Benoit   +4 more
wiley   +1 more source

Planetary Habitability Under the Light of a Rapidly Changing Star

The Astronomical Journal
Planetary atmospheric energy budgets primarily depend on stellar incident flux. However, stellar variability can have major consequences for the evolution of planetary climates. In this work, we evaluate how stellar variability influences the equilibrium
Tara Fetherolf, Sadie G. Welter, Colby M. Ostberg, Stephen R. Kane, Rory Barnes, Emilie R. Simpson   +5 more
doaj   +1 more source

Male reproductive system in stenopodidean shrimps: Unveiling basal reproductive traits in shrimp‐like Pleocyemata (Stenopodidae and Spongicolidae)

The Anatomical Record, EarlyView.
Abstract Stenopodidea represents one of the basal lineages within Pleocyemata, yet the male reproductive system (MRS) of this group remains poorly understood, with limited information available regarding its morphology and function. This study provides the first detailed description of the MRS in four stenopodidean shrimp species from two families ...
Caio Santos Nogueira, Lucas Rezende Penido Paschoal, Fernando José Zara   +2 more
wiley   +1 more source

Tides Tighten the Hycean Habitable Zone

The Astrophysical Journal Letters
Hycean planets—exoplanets with substantial water ice layers, deep surface oceans, and hydrogen-rich atmospheres—are thought to be favorable environments for life. Due to a relative paucity of atmospheric greenhouse gases, hycean planets have been thought
Joseph R. Livesey, Juliette Becker, Susanna L. Widicus Weaver   +2 more
doaj   +1 more source

Evaluating Bergmann's and Allen's rules in the long bones of the eastern gray squirrel

The Anatomical Record, EarlyView.
Abstract Ecogeographical rules predict variation in body size and appendage proportions across climatic gradients, yet intraspecific tests using long bones from wild populations remain limited among small mammals. This study tests the hypothesis that eastern gray squirrels (Sciurus carolinensis) conform to Bergmann's rule, that is, body size increases ...
Tyler Blake, Habiba Chirchir
wiley   +1 more source

Life at the end of worlds : modelling the biosignatures of microbial life in diverse environments at the end of the habitable lifetimes of Earth-like planets [PDF]

, 2014
This thesis investigates how increased global mean temperatures on Earth, induced by the increase in the luminosity of the Sun as it ages, change the types of habitable environments on the planet at local scales over the next 3 Gyr.
O'Malley-James, Jack T.
core   +1 more source

Discovery and validation of Kepler-452b:a 1.6 R_⊕ super earth exoplanet in the habitable zone of a G2 star

, 2015
We report on the discovery and validation of Kepler-452b, a transiting planet identified by a search through the 4 years of data collected by NASA's Kepler Mission. This possibly rocky planet orbits its G2 host star every days, the longest orbital period
Ramirez, Ivan, Buchhave, Lars, Borucki, William J., Gilliland, Ronald L., Jenkins, Jon M., Latham, David W., Marcy, Geoffrey W., Petigura, Erik, Endl, Michael, Ciardi, David R., Batalha, Natalie M., Esquerdo, Gilbert A., Tenenbaum, Peter, Sanderfer, Dwight, Rowe, Jason F., Cochran, William D., Bieryla, Allyson, Isaacson, Howard, Bryson, Stephen T., Henze, Christopher E., Wolfgang, Angie, Huber, Daniel, Caldwell, Douglas A., Twicken, Joseph D., Seader, Shawn, Li, Jie, Buchhave, Lars A., Campbell, Jennifer R., Catanzarite, Joseph H., Torres, Guillermo   +29 more
core   +1 more source

First Record of Tasmanian Devils in the Pilbara: Late Quaternary Subfossils From Juukan Gorge, Puutu Kunti Kurrama Country, and Insights Into Human—Faunal Relationships and Extinction

Archaeology in Oceania, EarlyView.
ABSTRACT This study presents the first unequivocal evidence for the presence of Tasmanian devils (Sarcophilus harrisii) in the Pilbara region of northwestern Australia, based on material recovered from archaeological excavations at Juukan Gorge on Puutu Kunti Kurrama and Pinikura country.
Timothy J. Churchill, Michael Slack, Elise Matheson, Liam Neill, Wanchese M. Saktura, Gavin Ashburton   +5 more
wiley   +1 more source

Exoplanets beyond the Conservative Habitable Zone. II. Occurrence

The Astrophysical Journal
We show that the extension of the habitable zone (HZ) due to the presence of liquid water on the nightside of tidally locked planets, calculated in earlier works, significantly increases the number of potentially habitable planets.
Amri Wandel
doaj   +1 more source