"To succeed in life, you need three things: a wishbone, a backbone and a funny bone." - Reba McEntire

Supplementary videos

Chordates: The Notochord and Vertebrate Movement
Giant Pyrosome and Salps: sea squirts are chordates without vertebrae
Dolphin Tale: is a dolphin a fish?
Whales are mammals 1:40 Humpback calf drinks 500 l of milk per day
Mudskipper can walk on land and breathe air
Raising walking fish on land
Platypus Hunts with "Sixth Sense" - electrolocation
Platypus genome: evolution of monotremes 180 MYA
Do Dolphins Have Hair Follicles? (SeaWorld)

Extra credit readings

• Acorn worm genome reveals gill origins of human pharynx Phys.org 11/18/15
• Coelacanth Genome Unlocked Scientific American 4/17/13
• Ancient Walking Whales National Geographic News 9/19/01
• Whale and hippo 'close cousins' BBC News 1/24/05
• Blue Whales With Pearly Whites New York Times 10/4/10
• These genes are made for walking – another step from fins to limbs Technology.org 1/22/14
• Genome analysis of the platypus reveals unique signatures of evolution Nature 5/8/08