Knowledge: The first HIV was discovered in 1970 and many people died from it as the doctors did not know at first. On the other hand, alpacas were originally found in 1900 in Bolivia

Conversation:
I love alpacas.
How nice, did you know that alpacas are a domesticated camelid?
I did not know that, I thought they were llamas.
Yeah, they are similar but alpacas are not llamas, people often confuse alpacas with them.
Now I understand, are they related?
Yes they are, both animals are related and can even cross-breed.
I wonder how long they have been around?
I am not sure about how long, but I know that they can be found in herd in Bolivia, Peru, Ecuador and Chile.
Wow, that is interesting. Do you know when they were first discovered?

Response: Oh yeah, alpacas were first discovered in 1900 in Bolivia.