New film from NOVA and HHMI Tangled Bank Studios reveals how scientists are attempting to harness fear--and the behavior changes it causes--to bring a national park in Mozambique back from the brink 


Premieres Wednesday, October 14 at 9 p.m. ET/8C on PBS

Also Available for Streaming Online and on the PBS video app|@novapbs


Boston, MA; September 22, 2020 -- NATURE’S FEAR FACTOR, a one-hour NOVA special, spotlights how one of the most ambitious wildlife recovery efforts ever attempted is using fear of predators to rebalance an ecosystem that is coming back from the brink. The film, from NOVA and HHMI Tangled Bank Studios, premieres on PBS on Wednesday, October 14 at 9 p.m. ET/8C on PBS

In the decades since civil war ravaged Mozambique’s Gorongosa National Park and wiped out more than 90% of its large mammals, recovery among species has been uneven. Some species have rebounded dramatically, others have not. And many of the plant eaters are acting in strange ways, going where they don’t typically go; eating what they don’t typically eat. Scientists believe two critical elements are missing from the park: large predators and the fear they instill. Now, in an ambitious effort to scare prey back into their natural balance, head of Gorongosa’s predator program Paola Bouley and senior wildlife veterinarian Antonio “Tonecas” Paulo, are reintroducing fierce African wild dogs into the park. 

Narrated by Michael C. Hall, NATURE’S FEAR FACTOR is a NOVA Production by HHMI Tangled Bank Studios for GBH Boston. The film features exclusive access to the Gorongosa Restoration Project, revealing how this monumental effort is providing a critical new home for the endangered wild dogs, helping restore one of Africa’s great national parks, and shedding new light on the role fear plays in wildlife ecosystems. It’s real-time field science that could well decide whether the Gorongosa ecosystem survives, or spirals out of control. 

“We are so excited to continue telling stories that push the boundaries of science,” said NOVA Co-Executive Producer Julia Cort. “The film explores exciting new theories about how predators can restore balance to systems that have been compromised. The findings from Gorongosa could help transform the way we approach ecological conservation.” 

“Questioning existing science is one of the pillars of scientific discovery,” said NOVA Co-Executive Producer Chris Schmidt. “It’s long been thought that predators primarily affect ecosystems by eating prey, but efforts like this one are forcing scientists to consider that their impact may be a lot more far-reaching. Just their presence causes fear, and that changes prey behavior with repercussions that ripple through the ecosystem.” 

“What Gorongosa makes clear to the world is that, if given a chance, nature is remarkably resilient,” said Head of HHMI Tangled Bank Studios Dr. Sean B. Carroll. “These scientists are putting the pieces in place so that nature can restore itself, and that gives us hope for the future.” 

With long-term and exclusive access, “Nature’s Fear Factor” takes viewers inside the grand experiment of Gorongosa National Park, from the arrival of the wild dogs on a special charter flight, to their release into the wild and beyond. Will they bond into a cohesive pack and reclaim a territory their species roamed many decades ago? Will they succumb to hidden dangers lurking in the park? And will their prey even know to be scared after decades of living the good life with no predators around? 

The scientists are also concerned that the pack might leave the unfenced park and head into the surrounding communities. That’s a problem Gorongosa is already facing with elephants, which cross the river to feast on nutritious crops grown by the local farmers. The park is using innovative solutions — including surprisingly effective beehive fences — to try and keep the elephants at bay, but they highlight the challenges of an effort of this scale. They’re creating the blueprints as they go, tapping into ecological knowledge from other places, and forging new ground in their understanding of complicated ecosystem dynamics. “It's a living laboratory,” says Princeton University ecologist Robert Pringle, “where we can bring our science out into the field and try to figure out the rules that ecosystems work by.” 

So far, the recovery effort seems to be working. Despite a setback with a snake, the wild dogs are thriving, coursing across the landscape like waves of teeth, scaring up everything in their path. And the prey are taking notice, changing their behavior as they adapt to their carnivorous new neighbors. In this dynamic landscape, predators, prey and scientists are all learning together, setting Gorongosa on a course for recovery, inspiring optimism for future predator reintroductions, and providing critical scientific insights for conservation efforts worldwide. 

NATURE’S FEAR FACTOR premieres Wednesday, October 14 at 9 p.m. ET/8C on PBS and will be available for streaming online and on the PBS video app. 

NATURE’S FEAR FACTOR is A NOVA Production by HHMI Tangled Bank Studios for GBH Boston. Narrated by Michael C. Hall. Edited by Emmanuel Mairesse. Produced and Directed by David Murdock. Executive Producers for HHMI Tangled Bank Studios are Jared Lipworth and Sean B. Carroll. Executive Producers for NOVA are Julia Cort and Chris Schmidt. NOVA is a production of GBH Boston. 

National corporate funding for NOVA is provided by Draper. Major funding for NOVA is provided by the David H. Koch Fund for Science, the Corporation for Public Broadcasting, and PBS viewers. Additional funding is provided by the NOVA Science Trust. 

About NOVA 

NOVA is the most popular primetime science series on American television, demystifying the scientific and technological concepts that shape and define our lives, our planet, and our universe. The PBS series is also one of the most widely distributed science programs around the world, and is a multimedia, multiplatform brand reaching more than 55 million Americans every year on TV and online. NOVA’s important and inspiring stories of human ingenuity, exploration, and the quest for knowledge are regularly recognized with the industry’s most prestigious awards. As part of its mission to make the scientific enterprise accessible to all, NOVA is committed to diversity and inclusiveness in all its work, from the production process to the range of stories we tell and voices we feature. In addition, science educators across the country rely on NOVA for resources used in the classroom as well as in museums, libraries, and after-school programs. NOVA is a production of GBH Boston; more information can be found at, or by following NOVA on Facebook, Twitter, or Instagram. 

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About GBH 

GBH is the leading multiplatform creator for public media in America. As the largest producer of content for PBS and partner to NPR and PRX, GBH delivers compelling experiences, stories and information to audiences wherever they are. GBH produces digital and broadcast programming that engages, illuminates and inspires, through drama and science, history, arts, culture and journalism. It is the creator of such signature programs as MASTERPIECE, ANTIQUES ROADSHOW, FRONTLINE, NOVA, AMERICAN EXPERIENCE, Arthur and Molly of Denali, as well as WORLD Channel and a catalog of 

streaming series, podcasts and on-demand video. With studios and a newsroom headquartered in Boston, GBH reaches across New England with GBH 89.7, Boston’s Local NPR®; CRB Classical 99.5; and CAI, the Cape and Islands NPR® station. Dedicated to making media accessible to and inclusive of our diverse culture, GBH is a pioneer in delivering media to those who are deaf, hard of hearing, blind and visually impaired. GBH creates curriculum-based digital content for educators nationwide with PBS LearningMedia and has been recognized with hundreds of the nation’s premier broadcast, digital and journalism awards. Find more information at 

About HHMI Tangled Bank Studios 

HHMI Tangled Bank Studios is a mission-driven production company that crafts exceptional films about science and scientists for broadcast, theatrical and digital distribution. As storytellers within a world class science organization, we are uniquely positioned to shine a light on some of the most significant scientific breakthroughs of our time – and explain why they matter. Recent films include The Farthest – Voyager In Space, which won an Emmy for best science documentary; Emmy-nominated The Serengeti Rules, a NY Times ‘critic’s pick’ which premiered at the Tribeca Film Festival and was broadcast on PBS/Nature; Peabody Award-winning Inventing Tomorrow, which premiered at Sundance and aired on PBS/POV; and Ric Burns’ Oliver Sacks: His Own Life, which premiered at Telluride Film Festival and debuts theatrically in September 2020. For more information, please visit 

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Jennifer Welsh