aviation pioneer Igor Sikorsky told his son that when he was young, there were plenty of scientific “naysayers,” even after the airplane had become a reality. (even the telephone was predicted to be impossible)

One of the prevailing “facts” was that there was an upper limit to the maximum weight of an aircraft of about 2,000 pounds. After all, nature proved it by the fact that the ostrich was the heaviest bird on earth, but it could not fly.

https://dailytimewaster.blogspot.com/2023/09/the-science-is-never-settled.html