Yes , yes , yeas , but , no . Historically we had all sort of creatures on earth , and more than that . Hoewer the future must be changed . Even right now there are countries that are using cancerogenic foods etc to infect other countries people or to control population . And if u do the research the number of people having the cancer is quite lot elevated these "modern days" . Hoewer , doesn t underestimate the issue treated in the video also . But , there is more abt the future . And more abt the past and present . You won t change past . Cos people have already done that . But you can change the future . And yes the tech to send messages in past exist. Let me say , we already send quantum info back in time with computers in 2019 also we can see past images with cronovisor etc. so if we can go from a to be we can go from b to a also .