The Unexplained
Titles in Series: Atlantis, The Bermuda Triangle, Crop Circles, Ghosts, Haunted Houses, Psychics, Stonehenge, UFOs
Unsolved Mysteries
Titles in Series: Amelia Earhart, Cahokia, D. B. Cooper, Easter Island, Irish Crown Jewels Theft, The Mary Celeste, Roanoke Colony, The Voynich Manuscript
Exploring Space
Titles in Series: Astronauts, Future Space Missions, Moon Landings, Probes, Rockets, Rovers and Landers, Space Stations, Telescopes
Wild Animals
Titles in Series: Alligators, Anacondas, Arctic Foxes, Grizzly Bears, Rattlesnakes, Rhinoceroses, Wild Boars, Wolverines
Dogs at Work
Titles in Series: Acting Dogs, Herding Dogs, Police Dogs, Search and Rescue Dogs, Service Dogs, Sled Dogs, Sniffer Dogs, Therapy Dogs
Major Disasters
Titles in Series: 2022 Pakistan Floods, COVID-19, The Dust Bowl, Fukushima, Hurricane Katrina, Indian Ocean Tsunami, Mount St. Helens, Texas Ice Storms
World’s Fastest
Titles in Series: World’s Fastest Aircraft, World’s Fastest Animals, World’s Fastest Cars, World’s Fastest Motorcycles, World’s Fastest Roller Coasters, World’s Fastest Spacecraft, World’s Fastest Trains, World’s Fastest Watercraft
Extreme Sports
Titles in Series: BMX Racing, Motocross, Mountain Biking, Rally Car Racing, Skateboarding, Snowboarding, Snowmobiling, Surfing
Video Games
Titles in Series: Action Games, Fighting Games, MOBA Games, Puzzle Games, Role-Playing Games, Sandbox Games, Sports Games, Strategy Games
