There are a lot of Alien cultures out there. If you look at even here on earth, I bet not a lot of people ever heard about Thailand, or Burma. Thailand is probably one of the major civilization and culture that is overlooked, but they played a lot of major role in shaping the history of Asian, especially China. The ancestors of the people who inhabit what is presently known as Thailand were the first people to grow and cultivate rice. It played a major role in how they feed the people Asia which allows the people the survive through hard time when there isn't much to eat, shaping the cultures in Asia as we know it, and now rice feeds people all around the world, not just in Asia, but in Africa and Latin America...they even grow rice in Italy and they've been doing for hundreds of years now since first contact with Asia. The Thai people also were the first people to make bronze, even before the Ancient Mesopotamia, and their bronze was superior because it didn't contain arscinic as one of the component of the alloy...they use tin instead. The Chinese picked that up right away and made elaborate bronze sculptures that they still can't figure out how they were to able to shape them that way even with use and knowledge of modern metalergy. Siam was a major trading partner with China since ancient time. Without the Thai people, the Chinese would had the idea to create Soy Sauce which was base on fish sauce; a lot of people in China were vegetarians so they had to use soy beans in the fermentation process instead of fish from the sea. The process is almost the same except you subsitute one for the other. I can go on and on about different cultures here on earth and forgotten history which a lot of people haven't even heard of.
Did you know the Gaelic people were forging better steels that the Roman at the time of Julius Ceasar invading Gaul. And the Native Americans influence the way how people cook around the world. that's right! They were the first people to cook meat on opened fire and using oven like method by burrying the carcassed in the ground and let the whole animals cook slowly on gentle heat. The European got the idea for grilling on opened fired, and BBQ, which is like doing it the ground but instead in a container heated by firewoods, from the Native Americans. The European had the technologies and the Indians have the methods. Now grilling is very popular around worldwid!