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Executive Producer Fernando Meirelles (Academy Award-Nominated Director of "City of God") and Malian musician Inna Modja take us on an epic journey along Africa's Great Green Wall - an ambitious vision to grow an 8,000km wall of trees stretching across the entire continent to fight back against runaway climate change, increasing conflict and mass migration.。It's over 500,000 square miles of rumored mysteries. In reality, the Bermuda Triangle may be filled with something even more incredible - Sharks. Marine Biologist Dr. Austin Gallagher is searching for the holy grail of shark research - the secret breeding grounds of tiger sharks, and he's hoping one special shark can lead him to it.。