What are Carl Sagan and Jacques Cousteau?

Answer 1

Carl Sagan was a famous American Astronomer and Jacques Cousteau was the co-developer of the aqua-lung and a famous French underwater explorer. Both were also very good publicists of their particular field of interest and both are now dead.

Answer 2

Carl Sagan was an American astronomer, astrophysicist, and science communicator known for popularizing science, astronomy, and space exploration through books and television series like "Cosmos". Jacques Cousteau was a French oceanographer, filmmaker, and inventor who co-developed the aqua-lung, allowing for Scuba diving, and produced numerous documentaries highlighting marine conservation and exploration.