Yeah, so far there were just estimations. Even this is still in a wayI mean my gf's father has a twin and they were mirror image of each other but then in less

Yeah, so far there were just estimations. Even this is still in a wayI mean my gf's father has a twin and they were mirror image of each other but then in less than 5 years both became so different that you can hardly even tell that they are related in any way. If there will be few more twins to repeat this project then a more generic result could be gathered.