No, the Big Bang did not start from a pulsar. The Big Bang theory is the prevailing scientific explanation for the origin and evolution of the universe. It suggests that the universe began as a singularity—an extremely hot and dense state—approximately 13.8 billion years ago. The universe then rapidly expanded and cooled, giving rise to the formation of matter, energy, and eventually galaxies, stars, and other celestial objects.
Pulsars, on the other hand, are highly dense, rapidly rotating neutron stars that are formed through the collapse of massive stars. Pulsars are themselves a product of stellar evolution and not directly connected to the origins of the universe.
While pulsars are fascinating objects and provide valuable insights into the physics of extreme conditions, they are not involved in the initial moments of the Big Bang or the early stages of the universe's formation. The study of pulsars and the study of the Big Bang fall within separate areas of astrophysics and cosmology.