Seriously, forget having a trained monkey, I want a trained otter that can catch fish for me. I'm not even joking about this one. The Chinese affixed ropes to the legs of otters which could wrangle schools of fish into the waiting nets of Chinese seamen. So much for running out of food. The Chinese would launch these animals from flooded compartments in the holds of the Junk ships, which leads me to my discussion of Chinese ships and our next amazing fact from 1421.
Much like revelation number five, this is gross. I'm going to turn it over to wikipedia to describe, and unlike other wiki entries, this one is real. Think of it as ancient Viagra.