In this day and age, gender has now become personal preference and belief. I personally believe there are only to genders, but according to others there are more. First things first, many people seem to believe sex is what you were born as, or what your genitals are. There are only two sexes, male and female.
Gender, is what many people consider a "social construct". I personally don't believe this, but for the sake of the question let's say it is. Gender is what you believe you are, there are many genders such as agender, non binary, etc. etc.
According to most people, there is an infinite number of genders, but I guess it all comes down to what you believe.
I hope I helped!
Linear B is a fascinating writing system that was used to write the Mycenaean Greek language. We don't know exactly how old it is, but it seems to have developed about 3,500 years ago. Scholars named it called Linear B because there's also an older version of it, which they call Linear A. Linguists still can't figure out how to read Linear A, and it's one of the great mysteries of classical studies.
The answer is “short-lived”