# Floyd E. Romesberg: The radical possibilities of man-made DNA

Every cell that's ever lived has been the result of the four-letter genetic alphabet: A, T, C and G — the basic units of DNA. But now that's changed. In a visionary talk, synthetic biologist Floyd E. Romesberg introduces us to the first living organisms created with six-letter DNA — the four natural letters plus two new man-made ones, X and Y — and explores how this breakthrough could challenge our basic understanding of nature's design.

- Kind: Talk
- Year: 2018
- By: TED.com
- Genres: Education, Science
- Archive: [Internet Archive](https://archive.org/details/FloydERomesberg_2018)
- Licence or status: [CC BY-NC-ND 4.0](https://creativecommons.org/licenses/by-nc-nd/4.0/) (as the archive states it)
- Who can watch: Tweens profiles and older (the archive gives no rating; placed by Invisible Network from its collection and subjects)

[Watch now](https://invisiblenetwork.ai/watch/archive/ia/FloydERomesberg_2018?play=1)