Most of them don't know it, of course. Two-thirds of those who think aliens have visited concede that it's just speculation on their part. Just a third of them believe there's actual evidence of alien stopovers, which could range from Ezekiel to Roswell, N.M., by way of the Incas.
Younger adults are more credulous.
But less-educated adults are more dubious, as are Republicans. No alien tax cut for them. No Net Don't Exist Exist, haven't visited visited opin. Among those who think intelligent aliens exist, just under six in 10 take the next step, which is to think they've physically visited Earth. This computes to 27 percent of all adults, or more than enough to keep Star Trek reruns on air well into the next millennium.