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Topic: ash
Creating wood ash cement from scratch, an experiment
How do you make a cement-like building material that won't dissolve in water? From scratch? In this Primitive Technology video, an experimental cement is made from crushed terracotta and refired wood ash that was burn...
Hunga Tonga-Hunga Ha’apai, The Birth of a New Island
In late December 2014 into early 2015, a submarine volcano in the South Pacific Kingdom of Tonga erupted, sending a violent stream of steam, ash and rock into the air. When the ash finally settled in January 2015, a n...
Petrified Forest National Park & how petrified wood is made
Fallen coniferous trees from 211-218 million years ago can be found scattered across the desert of eastern Arizona in the form of petrified wood. Made primarily from quartz, these geological wonders are actually fossi...
Time lapse eruption videos of Chile’s Calbuco Volcano
On April 22, 2015, Chile's Calbuco Volcano interrupted its 42 year dormancy with an eruption that was filmed by video enthusiasts all around the area. Martin Heck from Timestorm Films captured the 4K time lapse above....
Turn human waste into drinking water – Janicki Omniprocessor
"The water tasted as good as any I’ve had out of a bottle. And having studied the engineering behind it, I would happily drink it every day. It’s that safe." This huge, potentially game-changing machine, invented ...