evolution – Page 13 – My WordPress Site

The effects of atmospheric entry on comets’ impact velocity at the surface (left), and remaining mass (right) is shown as a function of initial radius, and velocity for an Earth-like atmosphere (with surface density 1.225 kg m−3 ). For comets that fragment (i.e., with small initial radius), this is given as the (mass-weighted) average velocity, and total mass of fragments that reach the surface. There is a sharp transition in the response to the atmosphere at an initial radius of about 100 m, in agreement with analytical predictions (equation 6). -- astro-ph.EP

Comets and Asteroids, Exoplanets, -moons, -comets, Extinction events, Gaia - Planetary Perspectives, Impact events, Origin & Evolution of Life

The Atmospheric Entry of Cometary Impactors

by Keith CowingMarch 31, 2025March 31, 2025

Oxygen produced by cyanobacteria may have created the conditions for green seas in the Archaean era (1.8 - 3 billion years ago) (Credit: Takashi Tsujino)

Atmospheres, Climate, Weather, Biogeochemical Cycles & Geobiology, Biosignatures & Paleobiology, Exoplanets, -moons, -comets, Gaia - Planetary Perspectives, Habitable Zones, Icy Worlds, Microbiology & Virology, Origin & Evolution of Life, Terraforming & Geoengineering, Water/Hycean Worlds & Oceanography

Were Earth’s Blue Oceans Once Green?

by Keith CowingMarch 30, 2025March 30, 2025

Prototaxites -- Illustration by Matthew Humpage

Biosignatures & Paleobiology, Fossils & Paleontology, Microgravity, Nomenclature, Systematics, Natural History, Origin & Evolution of Life, Plant Biology

Ancient Prototaxites Don’t Belong To Any Living Lineage – Possibly A Distinct Branch of Multicellular Earth life

by Keith CowingMarch 29, 2025March 29, 2025

In the trypanosomatid Angomonas deanei, the endosymbiont divides synchronously with the host cell. The nucleus-encoded protein ETP9 is essential for the division of the endosymbiont. Credit HHU/Anay Maurya and Eva Nowack

Genomics, Proteomics, Bioinformatics, Microbiology & Virology, Origin & Evolution of Life

How An Organelle Evolves

by Keith CowingMarch 20, 2025March 20, 2025

The branching moss Physcomitrium patens, which the researchers used to study stress reactions and compare them to algae (microscope image). -- Credit Tatyana Darienko

Atmospheres, Climate, Weather, Biogeochemical Cycles & Geobiology, Biosignatures & Paleobiology, Fossils & Paleontology, Gaia - Planetary Perspectives, Genomics, Proteomics, Bioinformatics, Habitable Zones, Origin & Evolution of Life, Plant Biology

600 Million Years Of Stress Guide Planet Evolution on Earth

by Keith CowingMarch 12, 2025

Overview of model architecture, training procedure, datasets, and evaluations for Evo 2.

AI - Data - Apps - Cybernetics, Biochemistry & Organic Chemistry, Biophysics, Biosignatures & Paleobiology, Citizen Science / Open Science, Commercial & Private Sector, Genomics, Proteomics, Bioinformatics, Nanotechnology & SynBio

Genome Modeling And Design Across All Domains Of Life With Evo 2

by Keith CowingFebruary 21, 2025March 7, 2026

Hycean world K2-18 b -- Grok via Astrobiology.com

Atmospheres, Climate, Weather, Biochemistry & Organic Chemistry, Biogeochemical Cycles & Geobiology, Biosignatures & Paleobiology, Exoplanets, -moons, -comets, Habitable Zones, Origin & Evolution of Life, Water/Hycean Worlds & Oceanography

Prospects For Biological Evolution On Hycean Worlds

by Keith CowingFebruary 13, 2025February 13, 2025

Evolutionary scenario of Fgf subfamilies in chordates. a) Evolutionary tree of chordate subphyla indicating main events of losses (L), gains (G), duplications (D), or expansions by burst of duplications (E), as well as main associated patterns of conservation, innovation, function shuffling and extinction of Fgf expression domains. -- Animals

Fossils & Paleontology, Genomics, Proteomics, Bioinformatics, Nomenclature, Systematics, Natural History, Origin & Evolution of Life

A New Evolutionary Scenario Marked By Massive Gene Loss And Expansion

by Keith CowingFebruary 11, 2025

Biosignatures & Paleobiology, Fossils & Paleontology, Origin & Evolution of Life

Pioneers of Origin of Life Studies—Darwin, Oparin, Haldane, Miller, Oró—And the Oldest Known Records of Life

by Keith CowingJanuary 29, 2025January 29, 2025

Phylogenetic tree of bacteria showing the occurrence of respiratory quinones.

Biochemistry & Organic Chemistry, Genomics, Proteomics, Bioinformatics, Microbiology & Virology, Origin & Evolution of Life

A Novel Quinone Biosynthetic Pathway Illuminates The Evolution Of Aerobic Metabolism

by Keith CowingJanuary 24, 2025January 24, 2025