8. What Chinese practices were unknown to Europeans during the time of Marco Polo?

Answer

Europe was not the only one that positively affected by Marco Polo's travels. Unsurprisingly, China, too, was affected in a positive manner. Marco Polo had introduced gunpowder to the Chinese. ... With trade between Europe and China, the Europeans were introduced to citrus fruits, spices, and other newly seen goods.

The number is Zero. It was created by a mix of ancient people such as Babylonians, Hindu and Mayan. It’s considered a huge advance in the Mathematics field because it represents “the nothing”, a notion of calculation that hadn’t any sign to represent. Without it, mankind could never reach complex Math operations that ended on the main science advances in our Era. Also maybe never could create the atom energy, the computer or even reach the moon.