The Facebook founder and CEO posted a new photo of his two month old baby girl serenely floating in what appears to be a lake as her billionaire daddy holds her lightly behind her head and looks adoringly into her eyes. He captioned the photo 'Max's first swim. She loves it!' [Facebook]

Zuck has just returned to work after a two month parental leave to spend time with Max - all Facebook employees receive four months paid parental leave. [Facebook]