The Extremes crew had trekked for two days through steep valleys covered in lush jungle to reach Hang son Doong cave ... around 200 metres beneath the Earth’s surface. Animals were quick ...

Hang son Doong, Vietnam, one of the largest caves ... On the surface, arguably the most hostile conditions found on planet Earth are at the poles. On Ellesmere Island, Canada, a pack of Arctic ...

Son Doong Cave: While scientists are busy searching ... There is a place deep beneath the Earth’s surface that feels like another world. This mysterious location closely resembles the mythical ...

This story appears in the June 2019 issue of National Geographic magazine. Italian physicist and photographer Alessandro Cerè took a break from work at the Centre for Quantum Technologies in ...