In Ted Talks about building a fictional world, they usually suggest doing lots of research. You should look at existing fictional worlds for inspiration and think about what makes them compelling. Also, it's important to have a unique hook that sets your world apart.
In TED playlist 6 talks on how to tell a story, you'll find speakers sharing insights such as the importance of emotional connection, using vivid language, and having a clear message.
For a story to be good in TED Talks, it typically needs to be authentic, relatable, and have a unique perspective. It should also be told in an engaging and passionate way that captures the listeners' attention and leaves a lasting impression.
The difference lies in the perspective. High school stories in ted talks are told from the point of view of students who are still in the midst of their high school journey or have just completed it. This gives a fresh and unfiltered look at high school, compared to other educational talks which might be more theoretical or research - based. For instance, a high school story might be about the first time a student participated in a debate and how it changed their confidence, while an educational talk could be about the history of debating in general.
I'm not sure specifically which speakers are in that particular 'ted talks about science fiction' without more information. There could be a variety of experts in the fields of science, literature, or technology.
You can also look for multiple perspectives on the topic. If different reliable sources agree, it's probably fact. Also, be cautious of overly emotional or one-sided presentations, as they might skew towards fiction.
The main reason is that stories have the power to connect with people on a deeper level. They help convey important messages and inspire action in a more impactful way than just presenting facts. Also, stories can make the talk more entertaining and keep the audience's attention throughout.