Knowledge: Lettuce was created in 100 BCE and people found it crazy and was not eaten until 1900. On the other hand, yam was first made in 1000 BCE.

Conversation:
I have a twin in real life and when people see us together, I get real sick of them asking if we are twins!
How interesting! A developing fetus is called a singleton if they are alone but a multiple if there is more than one developing!
Those embryos sure like multiplying! I wonder if twins are more rarer than triplets?
I don't actually know, though the twin rate rose 76% between 1980 and 2009, ending up at 33.3 for every 1,000 births.
Wow, do you know what caused the spike in the rate? Is it a genetic thing?
I'm not sure, but the Yoruba people have the highest twin rate in the world, possibly because they eat a yam that contains a natural phytoestrogen.
That is crazy. Do you know when yams were discovered?

Response: Of course. Yam was created in 1000 BCE.