All You Need To Know About Subway Systems | Full Science Documentary

[@mtsbr78]

Dublado em português do Brasil. Maravilhoso! Obrigado Get Factual. Mande muito mais dos seus bons docs dublados em português.

[@Heatherbob201]

Could you imagine trying to build a subway from scratch nowadays?? The red tape alone would take 10 years 😂. Great video!!

[@annesummers09]

This would be so much better without the 'interviews' and useless comments they make. It's annoying and distracting. unsub