How could Noah’s ark have possibly held all the species of life on the earth?
It didn’t. Noah’s ark is a story of bronze age mythology, not to be taken at face value. There is no way at all that Noah, even being real, could have pulled it off. There is simply no way. Creationist rhetoric, again, goes mystical and talks about the Hebrew translation which actually meant that the ‘mammals’ or ‘the birds’ or both were taken aboard. Also, it refers to only flooding the ‘land’, not the ‘globe’. The strangeness of this argument is not as strange as a story of outright jealousy and genocide on behalf of God, who would rather wipe out humanity and start on a clean slate than make an effort.