Biogeochemist Elisa Merz — © Abbey Dias Lake Fryxell is located in the McMurdo Dry Valley on the Antarctic mainland. The lake is covered year round with four to five

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