The earliest tools and weapons were made from stone, primarily flint. Then it was noticed that a nugget of copper (like a blue-green stone) could be melted in a fire and reshaped. This discovery eventually made it possible to melt copper into a liquid, then pour it into a mold and allow it to cool and harden.
SUCCESSOR:
bronze age
3D printing AI Artificial Intelligence Asteroid Belt astronomy Attack Methodology Augmented Reality BioGenetics Computing Einstein energy Era - Ancient Era - Electronic Era - First Industrial Era - Renaissance era - second industrial Ethics fisma geometry group theory hacking History of Science and Technology InfoSec inspire Knowledge Engineering mathematics Maxwell Nanotechnology news NIST Computer Security Penetration penetration testing physics risk management Robotics Science science fiction SciFi security controls Singularity Space Space Exploration telescope Tools vulnerability
Digg
StumbleUpon
Facebook
Twitter
Google Bookmarks
Add to favorites
RSS
[...] PRECURSOR: copper age [...]