Mens explosions are irrelevant.
And how do you know the bb didn't start as cold? It certainly inflated rapidly, the plasma reaching billions of degrees before beginning to cool. Before the start of the inflationary period nothing is known.
Psalm 104:30 says nothing about the bb
The bible is unforthcoming about how god is supposed to have created it, just that he did
Don't men's bombs inflate rapidly but going from cold to HOT
Outside of the Bible nothing is known before the start of the inflationary period except that at Psalm 90:2 God is from everlasting ( in other words, No beginning, No starting point for God )
The Bible (Genesis) is Not about how God created it but rather about getting Earth ready for us - Psalm 115:16 B
Perhaps with Adam then God was forthcoming about how He created Earth if Adam wanted to know
Without sin there was No reason for a person to not be forthcoming. Nothing to block mankind from knowing
Since we are all descended from fallen father Adam what is important for now is the settling of the 'sin issue'
Once the sin issue is settled, by the end of Jesus 1000 yr reign over Earth knowledge will be increased to a degree that now we do not yet know