Exploring Hong Son Doong Cave

Hong Son Doong, the world's largest cave, was formed by a river eroding Vietnam's limestone mountains. Discovered by British cavers in 2009, it remained largely unexplored until Ryan D Boot captured its beauty in a viral video using a remote-controlled camera in 2014. The cave features misty clouds, jungles, and ancient fossils, and has been open to the public since 2013, allowing more people to experience its wonders.

What does 'Hong Son Doong' translate to?

• Mystical cave

• Mountain river cave

• Hidden cave

• Ancient cave

Who explored Hong Son Doong cave in 2009?

• American explorers

• British cavers

• Vietnamese locals

• French scientists

How long did Ryan D Boot stay in the cave to make the video?

• Three days

• Five days

• Eight days

• Ten days

What technology was used to film the highest areas of the cave?

• Satellites

• Climbing equipment

• Helicopters

• Drones

What happened to the video after Wendie Boot released it?

• It was ignored

• It went viral

• It was criticized

• It was banned

What natural phenomenon is shown in the video due to humidity?

• Rainfall

• Misty clouds

• Fog

• Snow

When was the cave opened to the public?

• 2012

• 2013

• 2011

• 2010

How old are the fossils found in the cave?

• 200 million years

• 300 million years

• 400 million years

• 100 million years