FACT: Sharks have been around longer than dinosaurs. We can make guesses and similarities and analogs of what could have happened, but we're never going to know how life started on Earth. FICTION: Sharks are aliens! Join host Kasha Patel as she traces the ancient origins of sharks, their evolution, their cultural significance, genetic insights, and theories about life's cosmic origins.

• Gavin Naylor - Gavin Naylor 
• Big Bang Hum - John G. Cramer,University of Washington 
• Shark Fossils - Florida Museum of Natural History 
• Shark Evolution - Natural History Museum  
• Shark Cultural Significance - Hakai Magazine 
• Shark Cultural Significance - History Collection 
• Fermi Paradox - Space.com 
• Fermi Paradox - Live Science 
• Alien Theories - National Geographic 

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