EXCLUSIVE: In Nicolas Brown’s documentary The Serengeti Rules, he follows a group of scientists around the world as they studied different ecosystems to see how nature works. They discovered surprising conclusions in what that led to similar conclusions about life on our planet.

In the clip above, we see a serene scene as an otter swims through a serene environment of kelp surrounded by various creatures. This is just one scene in the documentary which tells the tale with profound implications for the fate of life on our planet. From the Serengeti to the Amazon jungle; from the Arctic Ocean to Pacific tide pools, the five scientists in the documentary dive deep into the inner-workings of various ecosystems and how they all adhere to a single set of rules that govern all life.

Brown is not a stranger to documenting nature and the environment. He has won three Emmys including one for Outstanding Continuing Coverage of a News Story—Long Form for the film The Truth About Global Warming. He has also won two BAFTAS and numerous accolades from various festivals. He also directed National Geographic’s award-winning Imax film Pandas: The Journey Home and the BBC’s docuseries Human Planet.

The Serengeti Rules will make its world premiere on Saturday, April 21 at the Tribeca Film Festival.