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
Multiple goals, multiple solutions, plenty of second-guessing and revising − here’s how science really works
If your mental image of a scientist looks like this, you’re due for an update. aluxum/E+ via Getty…
We’ve created a device that could allow instant disease diagnosis – while fitting inside your phone lens
Shutterstock Lukas Wesemann, The University of Melbourne Infectious diseases such as malaria remain a leading cause of death…
Something’s Amiss With the “Portal Illusion”
Look at the portal illusion long enough and you may find yourself wondering how this contraption is somehow…
Cells have more mini ‘organs’ than researchers thought − unbound by membranes, these rogue organelles challenge biology’s fundamentals
Specialized compartments within cells carry out specific functions. Christoph Burgstedt/Science Photo Library via Getty Images Allan Albig, Boise…