-
150
exploring and traveling inprove boat cnstruction
-
400
compass was created
the compass was created in 400. -
Feb 17, 618
improved bridges
-
Feb 17, 650
printing
-
Feb 17, 950
porcelin
-
Feb 17, 1000
rocket
-
Jul 20, 1092
inocilin for smallpox
-
Apr 18, 1100
paper was created with
paper was made with bark -
gun powder was created
