According to one snapshot of American sentiment, approximately how many U.S. adults expressed a firm conviction that aliens exist and have visited Earth?

Answer

Around four-in-ten U.S. adults.

One specific measurement indicated that approximately four out of every ten adults in the U.S. held the conviction that extraterrestrial beings exist and have physically traveled to Earth.

According to one snapshot of American sentiment, approximately how many U.S. adults expressed a firm conviction that aliens exist and have visited Earth?
humanbeliefextraterrestrialalienOpinion