Documentaries can be a great alternative to books as they provide a visual and auditory learning experience. They can offer a more engaging way to learn about a particular topic or subject, as they often include interviews, real-life footage, and expert opinions. Additionally, documentaries can be a good option for those who prefer to learn through audio-visual means rather than reading. However, it's important to note that documentaries may not always provide as much in-depth information as books, so it's beneficial to use a combination of both mediums for a comprehensive understanding. **

Scary documentaries are non-fiction films that explore real-life events, phenomena, or individuals that evoke fear, unease, or dread in the audience. These documentaries often delve into topics such as true crime, supernatural occurrences, or unexplained mysteries, and they use interviews, archival footage, and expert analysis to create a sense of tension and suspense. Scary documentaries aim to captivate and unsettle viewers by presenting unsettling and disturbing subject matter in a factual and realistic manner. **

People who are interested in a wide range of topics and have a curiosity about the world often know good documentaries. This can include film enthusiasts, educators, journalists, and individuals who are passionate about social issues, science, history, or the environment. Additionally, platforms like streaming services, film festivals, and documentary production companies often have experts and curators who are knowledgeable about high-quality documentaries. **

Some popular murder documentaries that are highly recommended include "Making a Murderer," which follows the case of Steven Avery, "The Jinx," which explores the life of Robert Durst, and "The Staircase," which delves into the mysterious death of Kathleen Peterson. These documentaries are praised for their in-depth investigations, compelling storytelling, and ability to keep viewers engaged throughout. Additionally, "Evil Genius" and "The Keepers" are also highly regarded for their gripping narratives and shocking revelations. **

Animal documentaries are often aired on channels such as National Geographic, Animal Planet, and Discovery Channel. These channels are known for their educational and informative programming about wildlife, nature, and conservation efforts. Viewers can enjoy a wide variety of animal documentaries that showcase the beauty and diversity of the natural world. **

Documentaries have the potential to increase knowledge and understanding on a variety of topics by presenting factual information in an engaging way. They can expose viewers to new ideas, perspectives, and cultures, which can broaden their horizons and deepen their understanding of the world. However, the impact on intelligence may vary depending on the individual's prior knowledge and interest in the subject matter. Overall, documentaries can be a valuable tool for learning and expanding one's knowledge base. **

As an AI language model, I don't have personal preferences, but I can tell you that many people enjoy watching documentaries because they provide an opportunity to learn about real-life events, people, and cultures. Documentaries can be both educational and entertaining, offering a unique perspective on various topics. Whether it's a nature documentary, a historical documentary, or a social issue documentary, there is a wide range of subjects to explore, making them appealing to a diverse audience. **

Some good undercover documentaries include "Blackfish," which exposes the treatment of killer whales at SeaWorld, "The Cove," which investigates the dolphin hunting industry in Japan, and "13th," which explores the intersection of race, justice, and mass incarceration in the United States. These documentaries use undercover footage and investigative journalism to shed light on important social and environmental issues, sparking public awareness and discussion. **