Results 31 to 40 of about 6,115 (251)

Adaptations of endolithic communities to abrupt environmental changes in a hyper-arid desert

Scientific Reports, 2022
The adaptation mechanisms of microbial communities to natural perturbations remain unexplored, particularly in extreme environments. The extremophilic communities of halite (NaCl) nodules from the hyper-arid core of the Atacama Desert are self-sustained ...
Cesar A. Perez-Fernandez, Paul Wilburn, Alfonso Davila, Jocelyne DiRuggiero   +3 more
doaj   +1 more source

The Peak Absorbance Wavelength of Photosynthetic Pigments Around Other Stars From Spectral Optimization

Frontiers in Astronomy and Space Sciences, 2021
In the search for life on other planets, the presence of photosynthetic surface vegetation may be detectable from the colors of light it reflects. On the modern Earth, this spectral reflectance is characterized by a steep increase in reflectance between ...
Owen R. Lehmer, Owen R. Lehmer, David C. Catling, Mary N. Parenteau, Nancy Y. Kiang, Tori M. Hoehler   +5 more
doaj   +1 more source

Bacterial Metal Accumulation as a Strategy for Waste Recycling Management

Resources, 2023
Sustainable mechanisms for efficient and circular metal recycling have yet to be uncovered. In this study, the metal recycling potential of seven metal-resistant bacterial species (Deinococcus radiodurans, Deinococcus aerius, Bacillus coagulans ...
Denise Kölbi, Alma Memic, Holger Schnideritsch, Dominik Wohlmuth, Gerald Klösch, Mihaela Albu, Tetyana Milojevic   +6 more
doaj   +1 more source

A False Encounter: An Interspecies Martian Tale [PDF]

Pulse, 2021
This project concerns a fictional scenario in which an AI rover encounters an alien life form in the crevices of a Martian rock. The seconds in which this encounter takes place are mysteriously wiped out from the rover’s Pancam metadata. It is speculated
Oscar Salguero
doaj  

“Freezing” Thermophiles: From One Temperature Extreme to Another

Microorganisms, 2022
New detections of thermophiles in psychrobiotic (i.e., bearing cold-tolerant life forms) marine and terrestrial habitats including Arctic marine sediments, Antarctic accretion ice, permafrost, and elsewhere are continually being reported.
Tetyana Milojevic, Margaret Anne Cramm, Casey R. J. Hubert, Frances Westall   +3 more
doaj   +1 more source

Stephen Hawking's Warning on Contacting Aliens: A Physics Perspective on the Intelligence Trap. [PDF]

J Biomed Phys Eng
The search for extraterrestrial intelligence is a fascinating and important endeavor, but it raises significant ethical and safety concerns. In the search for extraterrestrial intelligence, scientists use knowledge of physics to identify potential ...
Mortazavi SMJ, Bevelacqua JJ, Mortazavi SA, Rafiepour P, Welsh JS.   +4 more
europepmc   +2 more sources

Doppler cross-correlation spectroscopy as a path to the detection of Earth-like planets

Comptes Rendus. Physique, 2023
In the middle of the 20th century, a paradigm shift appeared concerning the expected frequency of planetary systems in the galaxy ...a shift induced by the observation of the rotational velocities of low main sequence stars (Struve 1952)!At the same time,
Mayor, Michel
doaj   +1 more source

Genomic Features of the Bundle-Forming Heliobacterium Heliophilum fasciatum

Microorganisms, 2022
Eight species of heliobacteria have had their genomes sequenced. However, only two of these genomes have been analyzed in detail, those from the thermophilic Heliomicrobium (Hmi.) modesticaldum and the alkaliphilic Heliorestis (Hrs.) convoluta.
Kelly S. Bender, Michael T. Madigan, Kyleigh L. Williamson, Marisa H. Mayer, Mary N. Parenteau, Linda L. Jahnke, Paula V. Welander, Sophia A. Sanguedolce, Abigail C. Brown, W. Matthew Sattley   +9 more
doaj   +1 more source

A Weakened Immune Response to Synthetic Exo-Peptides Predicts a Potential Biosecurity Risk in the Retrieval of Exo-Microorganisms

Microorganisms, 2020
The discovery of liquid water at several locations in the solar system raises the possibility that microbial life may have evolved outside Earth and as such could be accidently introduced into the Earth’s ecosystem.
Katja Schaefer, Ivy M. Dambuza, Sergio Dall’Angelo, Raif Yuecel, Marcel Jaspars, Laurent Trembleau, Matteo Zanda, Gordon D. Brown, Mihai G. Netea, Neil A. R. Gow   +9 more
doaj   +1 more source

Ladderpath Approach: How Tinkering and Reuse Increase Complexity and Information

Entropy, 2022
The notion of information and complexity are important concepts in many scientific fields such as molecular biology, evolutionary theory and exobiology. Many measures of these quantities are either difficult to compute, rely on the statistical notion of ...
Yu Liu, Zengru Di, Philip Gerlee
doaj   +1 more source