Where was matter before the big bang?
4087
Did spacetime start with the Big bang?
35409
Massless charged particles
50575
Collisions in space/vacuum
110030
Superluminal expansion of the early universe how is this possible?
70682
Mechanism of pair production and annihilation of matter
130124
Is it possible to learn about an event that occurred outside of your observable universe?
135584
Was the singularity at Big Bang perfectly uniform and if so, why did the universe lose its uniformity?
55505
How can a quasar be 29 billion light-years away from Earth if Big Bang happened only 13.8 billion years ago?
18026
How can it be that the beginning universe had a high temperature and a low entropy at the same time?
138552
Why does amount of protons define how matter is?
76637
Why aren't particles constantly "measured" by the whole universe?
113659
Why was the universe in an extraordinarily low-entropy state right after the big bang?
67531
Universe being flat and why we can't see or access the space "behind" our universe plane?
64715
How is it possible that we see light from shortly after the big bang?
82330
What does one second after big bang mean?
136839
Is there a known isotope that generates anti-matter?
156516
Was helium hydride really the first molecule?