This weekend’s stories range from Signals From Deep Space Contain Signs of New Physics to How to Follow the Webb’s Next Steps to Dark Galaxies Swarmed in the Early Universe, and much more.
In February 2020, four distinguished astrophysicists —Jonathan Carroll-Nellenback, Adam Frank, Jason Wright, Caleb Scharf— suggested that Earth may have remained unvisited by space-faring civilizations all the while existing in a galaxy of interstellar civilizations seeded by moving stars that spread alien life, offering a solution to the perplexing Fermi paradox. They concluded that a planet-hopping civilization could populate the Milky Way in as little as 650,000 years.