I have feature many times videos from Periodic Table Videos on youtube, because these people understand that chemistry is a science that many people may like, but not all can follow the scientific terms. So, they explain chemistry in simple words. For example, a scientist would consider that all of us know what an endothermic reaction, which is not true :-/ Periodic Table Videos uploaded a new video in which they explain what is an endothermic reaction, and why it is called like that. Brilliant!