SciManDan

Daniel Rourke, known online as SciManDan, is an English science communicator widely recognized as the most popular flat earth debunker on YouTube. Before becoming a full-time content creator, Rourke held A-levels in maths, physics, environmental science, and geography, and operated his own maths and science tutoring company. He was first inspired to address flat earth content by fellow YouTuber CosmicSkeptic, and began building a dedicated audience through patient, evidence-based responses to flat earth claims. His approach combines calm, methodical explanation with reaction-style videos that directly engage with flat earth proponents' own content.

SciManDan's channel covers a broader range of pseudoscience than the flat earth label might suggest. He regularly responds to creationist content, astrology claims, and viral pseudoscientific viral content, and his video on the eccentric theories of actor Terrence Howard accumulated over 1.6 million views, demonstrating his ability to translate complex scientific concepts to a wide audience. His recurring series "Flat Earth Friday" provides a regular platform for rebutting the latest flat earth arguments, while longer documentary-style videos tackle the sociological and psychological dimensions of conspiracy belief. He also runs a physics education channel called Physics For All.

Beyond his main channel, Rourke hosts The SciManDan Podcast, available on Spotify and Apple Podcasts, where he discusses science topics and skepticism with guests. Married with four children, he represents a grassroots tradition of science communication: no formal advanced degree, but genuine subject knowledge, a talent for accessible explanation, and a persistent commitment to following the evidence. His success demonstrates that effective science communication does not require a PhD—it requires clarity, patience, and the willingness to engage directly with the claims being made.