Astrobiology25- Page

Constraint on the lifetime 𝐿 = 10𝑛 of intelligent technological civilizations derived from the Fermi paradox. The expected number of coexisting civilizations 𝑁 is shown as a function of the

A Structural comparison of chlorophyll-based and retinal-based photosystems. Left: Type II reaction center with antenna complex from Thermochromatium tepidum88. The catalytic core (orange) contains bacteriochlorophyll pigments (green) that drive electron

The atmosphere of an exoplanet – Grok via Astrobiology.com Among the many recommendations of the Decadal Survey on Astronomy and Astrophysics 2020, we found that a priority area of research

Schematic representation of the effect of stellar contamination (TLS) with actual examples of the effect of TLS in simulated signals. In the left column, we show the stellar spectrum, both

Overview of sampling locations at the Aurora Vent Field (AVF) where DNA was detected. Visual of all sampling sites on the sulfide mound surrounding Hans Tore vent. — biorxiv.org Molecular

Sampling sites at Kap København (a) where permafrost soil samples were obtained at the erosion front left of the snowpack, Citronen Fjord (b) and Cape Morris Jessup (c). d: Location

iss074e0315662 (Feb. 13, 2026) Credit: NASA/Chris Williams Date Created:2026-02-13 larger image A portion of the Atacama Desert along Peru’s southern Pacific coast, featuring barren plains, rocky cliffs, vast sand dunes,

An 80 foot coal seam at the North Antelope Rochelle opencut coal mine.– Peabody Energy, Inc. — Provided by Peabody Energy CC BY 3. In the search for extraterrestrial intelligence

This image shows the location of the Central Molecular Zone (CMZ), a region at the core of our galaxy rich in dense and intricate gas clouds. This zone has been