Steve Mould
Steve Mould makes science videos built around curious experiments, writes books for young readers and performs science comedy with Festival of the Spoken Nerd.
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Latest
Steve’s happenings, collected from public sources, plus his backstory and Starbook, where fans write.
Known for
YouTube
CassellOverview
- From
- Gateshead, England
- Education
- Physics, University of Oxford
- Work
- Science presenter, YouTuber, author and comedian
- Breakout
- His 2013 self-siphoning bead-chain video, associated with the Mould effect
- On stage
- Festival of the Spoken Nerd, with Helen Arney and Matt Parker
Mini bio
How it started.
Steve studied physics at Oxford and began performing stand-up while at university. After graduating, he kept doing comedy but missed science. Discovering science communication gave him a way to bring both interests together. With Helen Arney and Matt Parker, he started a monthly London event that became Festival of the Spoken Nerd.
The beads that travelled.
His 2013 video of a bead chain rising out of a container before falling to the floor became a calling card. Cambridge researchers John Biggins and Mark Warner investigated the puzzle and published an explanation in 2014. The phenomenon became widely known as the Mould effect.
Beyond the channel.
Steve’s work also reaches readers and live audiences. His children’s books include How to Be a Scientist and The Bacteria Book; with Helen Arney he wrote The Element in the Room for adults. Festival of the Spoken Nerd takes experiments, maths and songs onto the stage and has made the BBC Radio 4 show Domestic Science.
Creditschronological, newest first
Books
- 2018The Bacteria BookAuthor
- 2017How to Be a ScientistAuthor
- 2017The Element in the RoomCo-author with Helen Arney
Television
- 2014I Never Knew That About BritainCo-host with Paul Martin and Suzannah Lipscomb
Online video
- 2013Self-siphoning beads / The chain fountainCreator and presenter
Awards
Quotes
I can spend a long time replying to emails from viewers that don’t lead to any incomeSteve Mould, How Success Happens / Entrepreneur
In a February 2026 interview, Steve discussed enjoying the work of helping viewers understand the science in his videos.
Trivia
- An asteroid is named after him: (628318) Stevemould. Its naming citation appeared in the IAU working group’s bulletin on 7 April 2025.
- He set up Maths Gear with Matt Parker to sell mathematical toys and curiosities.
- His book Wild Scientists is called Clever Creatures in the United States.
Find Steve
Follow Steve for curious experiments and the science behind them.
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