World's biggest cave found
Explorers have stumbled across a really big hole in the ground.
Found in a a remote Vietnamese jungle, the Son Doong cave has officially been named as the biggest single cave passage ever.
Son Dong at its widest reaches 140-by-140 metres and is a whopping 4.5km long. This easily beats the previous record-holder, the Deer Cave in Borneo.
Members of the British Cave Research Association were the first top explore the huge cavern after being guided to entrance by a local farmer.
Because of the dense forest the cave had managed to keep its secrets even though previous explorers would have walked right over it.
The British team plan to return next year with a biologist to spy on the creepy subterranean wildlife.
Just how long Son Doong keeps hold of the record is in some doubt as satellite images hint there could be massive holes underneath the deep Amazon rainforest.
For more amazing photos of the cave, click here.
Weird Science Factoid: Flamingos pee on their legs to cool themselves off. Don't try this on a beach.
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