It seems odd to me that the universe would be expanding at the same consistent spherical shape.
I’ve seen plenty of explosions and they never look like that.
The big bang, which consisted of literally all matter in the universe would surely be no different.
The big bang (if it is still a valid theory) would have been unlike any explosion you have ever witnessed. The big bang was not an explosion of only matter, since time and space were both created during this event as well.
Really, calling it an explosion is not right in the first place. It’s one of those unfortunate cases of bad naming in science, another being ‘The God Particle’ (which was originally supposed to be The Goddamn Particle.) Physicists prefer using the word ‘expansion.’
Higgs boson: The 'God Particle' explained
The existence of the Higgs boson completes the standard model of particle physics.