Rebecca Smethurst is a British astrophysicist, author, and YouTuber who is a junior research fellow at the University of Oxford. As a researcher, Smethurst studies the role that supermassive black holes play in inhibiting different types of galaxies from forming stars. Smethurst hosts her own YouTube channel, called Dr. Becky, where she posts science communication videos related to astronomy research and amateur astronomy. She has also written two popular science books, titled Space: 10 Things You Should Know and A Brief History of Black Holes.