Why are TED talks 18 minutes long (or less)?
31st December 2011
My answer to Why are TED talks 18 minutes long (or less)? on Quora
I imagine it’s because enforcing a shorter talk time results in consistently higher quality presentations, by forcing speakers to carefully structure their talk and strip out any unnecessary details.
A similar logic holds for five minute “lightning talks”, which are extremely popular at technical conferences. Only having 5 minutes forces people to get straight to the point and stay there.
More recent articles
- Profiling Hacker News users based on their comments - 21st March 2026
- Thoughts on OpenAI acquiring Astral and uv/ruff/ty - 19th March 2026
- GPT-5.4 mini and GPT-5.4 nano, which can describe 76,000 photos for $52 - 17th March 2026