Watch Mind Blowing Breakthroughs Science show Season 1 Episode 15 Online
- COUNTRIES: South Korea
- Subtitles: Español,English,한국어/조선말
The Baron proposes a show dedicated to time. So he invites a specialist from medieval Korea: Jang Yeong-sil. When the King's guards slept and did not ring the bells indicating different times of the day, the King asked Jang to create a machine that told time automatically. But how did Jang do it?
