Gandalf

After an unprecedented Goblin attack on the Shire, Bilbo finds himself whisked back to Erebor with his son he never wanted Thorin to know about.

The scholars, historians, and budding scientists of Middle-Earth literally froth at the mouth trying to determine just where new dwarfs come from in a population that seems to be entirely male. Do they spring from holes in the ground? Do they carve them out of stones? Do they have some disgusting and painful sounding process where the men give birth? The dwarves aren't talking... They're too busy laughing their butts off over the situation!