Eric Walker added Roger Penrose - Why Did Our Universe Begin? - YouTube to Big Bang
Eric Walker added Quanta Magazine to Big Bang
Eric Walker added When Gravity Breaks Down - Facts So Romantic - Nautilus to Black holes, Quantum gravity and Big Bang
Eric Walker added a number of topics and a number of links to Astronomy, astrophysics and cosmology, and added Astronomy, astrophysics and cosmology to Space travel, exploration and defense and Physics
Eric Walker added a number of links to Big Bang, and added Big Bang to Astronomy, astrophysics and cosmology