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- UFO Abduction and UFO Encounter Stories
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- Ulises y la Ciencia - Cienciaes.com
- Um Aluno Perguntou
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- Un Cambion Que Genera Mas De Un Resultado
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- Un like para la ciencia
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- Understand Anything
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- Unearthed - Mysteries from an unseen world
- Unearthing Paranormalcy
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- Unexplained Online Podcast
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- Unidade de conservação de uso sustentável - Reserva Extrativista RESEX
- Unifact
- Unit 7 On Podcast
- United Soybean Board
- Unit 7 On Podcast
- United Soybean Board
- Universe Today podcasts with Fraser Cain
- Universidad Del Tolima by GEA
- Universo bovino
- Universo das abelhas
- Universo Paralelo
- Unless: Stories from Everyday Earth Savers
- Unnatural & Natural selection
- UNSERE MeeresWELTEN
- UNSTOPPABLE YOU!
- Unsupervised Thinking
- UNTOLD RADIO AM
- UrAtujMy podcast
- Urban Agriculture
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- US Imaging in cardiac and vascular medicine: from pre-clinical to clinical studies
- US News | Science Discoveries
- Us Talking About Science
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- Using Asteroids To The Further Humanity
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