Historical events, archilological finds, non biblical writings collaborate the bible.
Scientific facts stated in the bible are confirmed by modern science.
As for knowing:
KJV
Hebrews 11:1
Now faith is the substance of things hoped for, the evidence of things not seen.
Romans 10:17
So then faith cometh by hearing, and hearing by the word of God.
Historical events, archilological finds, non biblical writings collaborate the bible.
Scientific facts stated in the bible are confirmed by modern science.
As for knowing: