1. Wikipedia: A great source of information, Wikipedia is the definitive encyclopedia collection online. With over sixty million entries and counting it offers brief descriptions of any and all topics imaginable.
2. Khan Academy: Khan Academy is a nonprofit educational organization created with the goal of providing free, in-depth educational videos to students of all ages. It covers a wide range of topics from science and math to the humanities.
3. Quora: Quora is a question-and-answer based platform that provides answers from a variety of experts on a wide range of topics. It is a great way to come up with new ideas and learn more about interesting topics.
4. TED Talks: TED Talks are incredible educational videos where experts from many different fields give lectures on a variety of topics. Each presentation is usually around 15 minutes long
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