Results 101 to 110 of about 10,002 (189)

An Objective Bayesian Analysis of Life's Early Start and Our Late Arrival

, 2020
Life emerged on the Earth within the first quintile of its habitable window, but a technological civilization did not blossom until its last. Efforts to infer the rate of abiogenesis, based on its early emergence, are frustrated by the selection effect ...
Kipping, David
core  

Searching for Evidence of Life in Deep Time and Space [PDF]

Cyanobacterial mats provide insights into ancient benthic microbial communities and their biosignatures. Thick mats occupy hypersaline saltern ponds at Guerrero Negro, Baja California, Mexico.
Des Marais, David J.
core   +1 more source

Editorial: Presentations at the 4th Workshop of the German Astrobiological Society (DAbG) on Astrobiology, 26–27 September 2019, Vienna, Austria

Frontiers in Astronomy and Space Sciences, 2021
Tetyana Milojevic, Rosa De La Torre Noetzel, Oliver Strbak, Dirk Schulze-Makuch, Dirk Schulze-Makuch, Dirk Schulze-Makuch   +5 more
doaj   +1 more source

Tracking the record of early life

Carnets de Géologie, 2005
Life may have been present on Earth from about 3.8 Ga or earlier. Based on a combination of geochemical, morphological and sedimentological evidence, the early biosphere included a wide diversity of prokaryotes exhibiting modern metabolisms that thrived ...
Marshall Craig P., Javaux Emmanuelle J.
doaj  

Editorial: Terrestrial analogues of extraterrestrial environments: Assessing habitability and biosignatures preservation

Frontiers in Astronomy and Space Sciences, 2022
Jonathan Clarke, Margarita Safonova, Chandra Sivaram, Siddharth Pandey, Jennifer G. Blank   +4 more
doaj   +1 more source

Editorial: Head & Neck Cancer and Esophageal Cancer: From Biosignatures to Therapeutics

Frontiers in Oncology, 2021
Victor C. Kok, Victor C. Kok, Cheng-Chia Yu, Cheng-Chia Yu, Jorge A.R. Salvador   +4 more
doaj   +1 more source

Vertical Transmission of Gut Dysbiosis From Mothers With Gestational Diabetes to Infants

Journal of Diabetes
Background Vertical transmission of microbes from a mother's gut to their offspring plays a crucial role in the genesis of the early life gut microbiome.
Jia Ming Low, Abhishek Gupta, Rachel Toh, Su Lin Lim, Shiao‐Yng Chan, Sanjay Swarup, Le Ye Lee   +6 more
doaj   +1 more source

Protein and transcriptional biomarker profiling may inform treatment strategies in lower respiratory tract infections by indicating bacterial–viral differentiation

Microbiology Spectrum
Lower respiratory tract infections (LRTIs) remain a significant global cause of infectious disease-related mortality. Accurate discrimination between acute bacterial and viral LRTIs is crucial for optimal patient care, prevention of unnecessary ...
Dhanasekaran Sivakumaran, Synne Jenum, Dagfinn Lunde Markussen, Sondre Serigstad, Aashish Srivastava, Christina Skår Saghaug, Elling Ulvestad, Siri Tandberg Knoop, Harleen M. S. Grewal   +8 more
doaj   +1 more source

Biological, Equilibrium and Photochemical Signatures of C, N and S Isotopes in the Early Earth and Exoplanet Atmospheres

Life
The unambiguous detection of biosignatures in exoplanet atmospheres is a primary objective for astrobiologists and exoplanet astronomers. The primary methodology is the observation of combinations of gases considered unlikely to coexist in an atmosphere ...
James R. Lyons
doaj   +1 more source

Operational considerations for approximating molecular assembly by Fourier transform mass spectrometry

Frontiers in Astronomy and Space Sciences
Some of the most common life detection techniques for planetary exploration focus on organic molecule characterization, but life on other planets may not chemically resemble that found on Earth.
Gabriella M. Weiss, Gabriella M. Weiss, Gabriella M. Weiss, Silke Asche, Hannah McLain, Angela H. Chung, Angela H. Chung, Angela H. Chung, S. Hessam M. Mehr, Leroy Cronin, Heather V. Graham   +10 more
doaj   +1 more source