3 papers
astro-ph.EP2025
Are We There Yet? Challenges in Quantifying the Frequency of Earth Analogs in the Habitable Zone
Rachel B. Fernandes, Samson Johnson, Galen J. Bergsten +43
Searching for life elsewhere in the universe is one of the most highly prioritized pursuits in astronomy today. However, the ability to observe evidence of Earth-like life through…
q-bio.PE2025
A reassessment of the "hard-steps" model for the evolution of intelligent life
Daniel B. Mills, Jennifer L. Macalady, Adam Frank +1
According to the "hard-steps" model, the origin of humanity required "successful passage through a number of intermediate steps" (so-called "hard" or "critical" steps) that were in…
astro-ph.IM2025
Earth Detecting Earth: At what distance could Earth's constellation of technosignatures be detected with present-day technology?
Sofia Z. Sheikh, Macy J. Huston, Pinchen Fan +5
The field of the Search for Extraterrestrial Intelligence (SETI) searches for ``technosignatures'' that could provide the first detection of life beyond Earth through the technolog…