Results 241 to 250 of about 79,053 (289)

Maynard Smith's analogy, realized: Common ancestry constrains evolutionary percolation through protein space. [PDF]

Proc Natl Acad Sci U S A
Manivannan SN, Ogbunugafor CB.
europepmc   +1 more source

Viruses in Extreme Marine Environments and Their Potential Existence in Extraterrestrial Environments. [PDF]

Viruses
McMinn A, Liang Y, Wang Z, Wang M.
europepmc   +1 more source

Out There No One Has a Right to Die. [PDF]

Bioethics
Häyry M.
europepmc   +1 more source

In This Issue. [PDF]

Proc Natl Acad Sci U S A
europepmc   +1 more source

The rainout of formaldehyde favors a formose-based origin of life in shallow ponds

Scherf M, Constatinou T, Rimmer P, Woitke P, Ferus M, Lammer H, Cassone G, Weichbold F, Eminger P, Nemeckova K, Kacina J.   +10 more
europepmc   +1 more source

Planets in habitable zones: [PDF]

Astronomy and Astrophysics, 2003
The recently discovered planetary system in the binary GamCep was studied concerning its dynamical evolution. We confirm that the orbital parameters found by the observers are in a stable configuration. The primary aim of this study was to find stable planetary orbits in a habitable region in this system, which consists of a double star (a=21.36 AU ...
Barbara Funk, Elke Pilat-Lohinger, F Freistetter   +2 more
exaly   +5 more sources

Effects of M dwarf magnetic fields on potentially habitable planets [PDF]

Astronomy and Astrophysics, 2013
A.A.V. acknowledges support from the Royal Astronomical Society through a post-doctoral fellowship. J.M. acknowledges support from a fellowship of the Alexander von Humboldt foundation. P.L. acknowledges funding from a STFC scholarship.
Aline Vidotto, Jean-François Donati, Alexander J B Russell   +2 more
exaly   +2 more sources

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Habitable Planets with High Obliquities

Icarus, 1997
Earth's obliquity would vary chaotically from 0 degrees to 85 degrees were it not for the presence of the Moon (J. Laskar, F. Joutel, and P. Robutel, 1993, Nature 361, 615-617). The Moon itself is thought to be an accident of accretion, formed by a glancing blow from a Mars-sized planetesimal.
D M, Williams, J F, Kasting
openaire   +2 more sources

Habitable Planet, Characterization

2011
The spectrum of a planet can contain signatures of atmospheric species, which create its spectral fingerprint. The presence and abundance of atmospheric species, in the context of the properties of the star and the planet, can elucidate the underlying physics and characterize a planetary environment.
Lisa Kaltenegger, Franck Selsis
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Habitable Planet

Educational Media Reviews Online, 2013
Distributed by Annenberg Learner, PO Box 55742, Indianapolis, IN 46205-0742; 800-532-7637Produced by Harvard-Smithsonian Center for AstrophysicsDirector n/a2007, DVD, 390 mins. (Consisting of 13, 30 min units) The Habitable Planet is a multimedia course, divided in to 13 units, covering earth’s geophysical, atmospheric, and oceanic ecosystems.
openaire   +1 more source