Adam was made by the hands of God,and then came Eva,out of therib of his husband,the number is 13,then she made a misstake to listen to satan who was in the snake,and made her pregnant cine,that is why Adam couldn,t have a navel like we have these days,then came Abel,his half brother,being murdered coase he couldn,t stand that God had put His eyes on him,so then the navel came,like they say whatcame first with a checken the egg or the chicken,think about that.