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“This is a horizontal cave and is much bigger than the Japanese discovery,” he said referring to the recent findings by a Japanese spacecraft, Kaguya. This spacecraft had discovered a tunnel which was 65 m wide and 80 m deep in the volcanic Marius hill range on the lunar surface. “This finding would go a long way in India’s quest to set up a permanent base on the Moon. Such wide tunnels could sustain underground lunar outposts, while the ceilings could help protect astronauts from space radiation, meteoroid impacts and wild temperature fluctuations (up 300 degree centrigrade) that is commonplace on the lunar surface,” Mr Arya explained.