The method of making Japanese swords dates back about 3000 years, with a shift from bronze to steel occurring 1200 years ago. The steel-making process in Japan was influenced by the country’s geology, as it lacked sedimentary iron oxides. The Japanese developed a method to extract iron from sand, which provided a high-quality source for steel production.
Related Posts
More climate-warming methane leaks into the atmosphere than ever gets reported – here’s how satellites can find the leaks and avoid wasting a valuable resource
Riley Duren, University of Arizona Far more methane, a potent greenhouse gas, is being released from landfills and…
Decades of research document the detrimental health effects of BPA – an expert on environmental pollution and maternal health explains what it all means
The chemical BPA has been shown to leach from food packaging products into our bodies. Jacobs Stock Photography…
Does the Speed of Light Ever Change?
The slowing down of light in a material is due to the interaction of the light wave with…
New Biomaterial Can Repair Tissues “From the Inside Out”
Researchers at the University of California San Diego created a new biomaterial that can be injected intravenously and…