The questions you were too embarrassed to ask.
Animated science explainers for the questions you were too embarrassed to ask. Watch, read, listen, experiment and test yourself.
Playing the video loads it from YouTube, which sets its own cookies. Privacy
New episode
When you lose weight, where does the fat go?
Lose 10 kilos of fat. You breathe out over 8 of them.
From the blog
All posts
5 things that surprised us about where fat goes
To lose 10 kg of fat you breathe in 29 kg of oxygen, and your fat cells shrink instead of disappearing. Five sourced surprises.
How we made "Where does the fat go?"
A campfire first, the chemistry second, every number checked against the paper, animation built in code, and a cloned voice we tell you about.
Watch
A short version for your feed, and a longer one with the real mechanism, the numbers and the sources.
Watch the episode
Learn it properly
Read the full article, try the interactive lab, then check what stuck with a quick quiz.
Read and practise
Listen
Every long episode as audio, with chapters and a transcript. It keeps playing while you browse.
Start listening
Illustrations made with AI (OpenAI)