-
-
parts of the semi-circles and but them together to make a bridge. The bridge was stronger and wider.
-
Accidentally discovered by alchemists working with saltpeter looking for the secret to eternal life. MILITARY TECHNOLOGY
-
Rockets were powered by a black powder made of saltpeter, charcoal, and sulfur. The first rockets were fireworks
-
Silk is a Caterpillar home it keeps it protected.
