Because just 10 percent of Rome’s archaeological heritage has been excavated, much of the city’s history still lies underground. The development of Line C, a 26 kilometer subway line beneath historic Rome, provides an unprecedented chance to locate, preserve, and study these hidden sites, giving experts fresh insights into the ancient world. Watch Rome Underground, premiering on Monday 22nd of December at 8pm, on National Geographic UK | National Geographic UK

4.2M views · 36K reactions | Half of all isolated tribes could be wiped out in the next decade if more is not done to help them, according to a new report by the NGO Survival International.  Watch our documentary on YouTube: https://bit.ly/43hoUlk | BBC World Service | Facebook