Otto Wichterle
In 1970, Wichterle was expelled again from his position in the institute, this time for signing "The Two Thousand Words" . Full recognition did not come until the Velvet Revolution in 1989. In 1990, he was made president of the Czechoslovak Academy of Sciences and was the honorary president of the Academy of Sciences of the Czech Republic after that. Wichterle was a member of a number of foreign academies of science, he received many awards and honorary doctorates from several universities.