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Science television often gets shoved into the documentary ghetto, but the best channels in this category prove that there's room for more than just blue-chip nature films and talking-head explanations. With only 24 dedicated channels worldwide, the good ones are concentrated in countries that take science communication seriously: China, the United States, Russia, India, and France. The difference between a channel that teaches you something and one that just fills airtime comes down to how they handle visual evidence. A great science channel shows you the data, the lab footage, the slow-motion collision. A lazy one is just a narrator reading Wikipedia over stock footage. China's CCTV-9 (Documentary) and its science offshoots invest heavily in original production, think deep-sea exploration and paleontology series that actually travel to dig sites. Russia's Nauka 2.0 leans into engineering and physics with a Soviet-era pride in machinery, while France's Ushuaïa TV mixes nature with environmental activism in a way that feels genuinely urgent. In the US, Discovery Science and the Smithsonian Channel still carry the flag, but they've gotten addicted to alien theories and ancient astronaut nonsense. The real value of live science TV is the ability to catch a space launch, a volcanic eruption, or a NASA press conference in real time. That's when the format justifies itself. If you want to watch a blackboard being filled with equations or a live dissection, you have to hunt for the obscure, but that's what Tvivu's directory is for.