Underground, where this is no GPS and certainly no Wi-Fi, mapping caves requires a different kind of technical ingenuity. Thus, there is cave radio. To learn about the DIY world of cave radio and underground exploration, Gizmodo picked the brain of Stanley Sides, tinkerer and former president of the Cave Research Foundation.
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You don’t even need a flashlight to look for cave paintings in the dark: you just need the sound of your own voice. By listening to echoes as they walk through Spanish caves, acoustic archaeologists are unlocking the secrets of underground soundscapes.
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To grow mushrooms is to let things rot, so something’s a lot of things are rotten in the state of Pennsylvania.
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See that tiny speck in the bottom right corner? That’s a person—a very hard-to-see person, standing inside Vietnam’s enormous Son Doong cave, the largest in the world. Photographer Ryan Deboodt ventured inside to get these astounding shots.
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There are more than 450 artificial caves excavated from sandstone beneath the streets and buildings of Nottingham, England—including, legendarily, the old dungeon that once held Robin Hood. Not all of these caves are known even today, let alone mapped or studied.
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