Super producer The Alchemist celebrates his birthday by digging into the vault and releasing a new song entitled "Biology" featuring frequent collaborators, Mobb Deep. Sit back with a cold beverage and enjoy this banger. Follow The Alchemst and Mobb Deep @MobbDeep @PRODIGYMOBBDEEP @HAVOCMOBBDEEP) @Alchemist) on Twitter. https://twitter.com/Alchemist https://twitter.com/PRODIGYMOBBDEEP https://twitter.com/HAVOCMOBBDEEP https://twitter.com/MobbDeep