Our story starts with cells.  Not our cells but the cells of our closest relatives.  The great apes. Within the nucleus of their cells the great apes have 24 chromosome pairs.  We have 23 pairs.  If we share a common ancestor, what happened to the missing chromosomes? Evolution Talk is also a book! You can find links to Amazon, Barnes & Noble and others on the front page of EvolutionTalk.com, or call your local bookstore and ask them to order a copy.   Music in this Episode Firefly by Podington Bear, License (CC BY 3.0): Artist website: soundofpicture.com Crusty Lily by Podington Bear, License (CC BY 3.0): Artist website: soundofpicture.com Horn Haze by Podington Bear, License (CC BY 3.0): Artist website: soundofpicture.com Poof by Podington Bear, License (CC BY 3.0): Artist website: soundofpicture.com