There’s a new episode of PBS Eons.  This one is about eggs, the platypus, and of course birds!  They tackle the endless question “What came first the Chicken or the egg?”.

The story of the egg spans millions of years, from the first vertebrates that dared to venture onto land to today’s mammals, including the platypus, and of course birds. Like chickens? We’re here to tell you: The egg came first.