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Zoo Day: Madagascan Hissing Cockroach

Of all the species of animals on the planet, this one hasn't changed much in the last 250-million years.

SAN DIEGO (NEWS 8) - Of all the species of animals on the planet, this one hasn't changed much in the last 250-million years.

There's a good reason the Madagascan Hissing Cockroach uses that hiss it gets its name from. 
     
Chris Mooney of the San Diego Zoo joined News 8 to tell us all about these critters.
 

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