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Each video guides viewers through the progress of one or more projects demonstrating the techniques and methods he uses to create tools or buildings. [9] As he explains on his blog, he builds "completely from scratch using no modern tools or materials", only using what he can source from his natural environment, such as plant materials, clay, soil, and stones.
Obsidian projectile point.. Obsidian is a naturally formed volcanic glass that was an important part of the material culture of Pre-Columbian Mesoamerica.Obsidian was a highly integrated part of daily and ritual life, and its widespread and varied use may be a significant contributor to Mesoamerica's lack of metallurgy.
From the Pacific Islands to the Arctic Circle, “In Real Life” goes to the frontlines of the debate over deep sea mining.
Obsidian can be used to make extremely sharp knives, and obsidian blades are a type of glass knife made using naturally occurring obsidian instead of manufactured glass. Obsidian is used by some surgeons for scalpel blades, although this is not approved by the US Food and Drug Administration (FDA) for use on humans. [61]
The sea life was all part of an ecosystem that evolved around his raft and followed him for 1,800 nautical miles (3,300 km) across the ocean. He collected drinking water from two solar stills (the third of which he had cut open in order to know how to use them) and various jury-rigged devices for collecting rainwater , which together produced ...
Since his survival drift, he's made dozens of additional offshore passages and ocean crossings, most of them with no more than two other crew. This incident is featured on the I Shouldn't Be Alive episode "76 Days Adrift". Callahan's story also featured on an episode of British survival expert Ray Mears's television series Extreme Survival.
Obsidian hydration dating (OHD) is a geochemical method of determining age in either absolute or relative terms of an artifact made of obsidian.. Obsidian is a volcanic glass that was used by prehistoric people as a raw material in the manufacture of stone tools such as projectile points, knives, or other cutting tools through knapping, or breaking off pieces in a controlled manner, such as ...
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