It isn't really "known" what year monkeys were first known to humans. One suggestion is that when humans first evolved, they were a variant of primates, and thus they would have known each other since the human race was born, or even before...
in the year 2012 when all humans die
The moon was first visited by humans in the year 1969.
The significant event where humans first began to use tools and create art, marking the beginning of the 0000 year period, is known as the Paleolithic Era.
Assuming non died in the 5 year period. Year 1 2 monkeys + 2 babies Year 2 4 monkeys + 4 babies Year 3 8 monkeys + 8 babies Year 4 16 monkeys +16 babies Year 5 32 monkeys + 32 babies So at the end of year 5 there would be 64 monkeys.
1969
Spider monkeys are not extinct.
Lead has been known to humans since ancient times, with evidence suggesting that it was first discovered around 6,000 BC. It is one of the oldest metals to be used by humans due to its abundance and easy extraction.
Theirs not really a year they developed in many years.
Cooking with fire was known to ancients. It predates the cave paintings. Using fire to cook happened before writing did, so no one recorded who did it first - even if it was known.
1876 in London
1789 was known as First year of liberty.
The year was 1969.