The Loneliest Whale in the World - A whale sings at a frequency no other whale can hear — but why? How did scientists even discover a voice so rare it echoes alone across the Pacific? Could this be a new species, or just a lonely outlier of nature? This story follows the mysterious “52-hertz whale” — a voice scientists have tracked for decades. Dive into the mystery behind the ocean’s most haunting song. | The Brain Maze

Discover one of the ocean’s greatest modern mysteries in the quest to find the elusive 52-hertz whale. Directed by Joshua Zeman, #TheLoneliestWhale arrives in theaters July 9 and on demand July 16. | Leonardo DiCaprio