Barbara Ann Rosenthal (born 1948) is an American avant-garde artist, writer and performer. Her existential themes have contributed to contemporary art and philosophy. Her pseudonyms include "Homo Futurus," taken from the title of one of her books and "Cassandra-on-the-Hudson," which alludes to "the dangerous world she envisions" while creating art in her studio and residence, located since 1998 on the Hudson River in Greenwich Village, NYC. She successfully trademarked "Homo Futurus" in 2022.