That's according to a Reuters Ipsos poll, which probed 23,000 adults in 22 countries, and discovered that India is an epicentre of ET activity, with 45 per cent convinced the invasion has already begun.
The Chinese, too, clocked up a substantial 42 per cent of believers, followed by third-placed Japan with 29 per cent.
The Belgians, Dutch and Swedes are having none of it, bottoming out the list with a mere eight per cent. Blighty, meanwhile, scored 16 per cent - a figure perhaps artificially boosted by followers of David Icke.
The overall average of those saying yes, the lizard people have arrived, was 20 per cent, and while the 80 per cent who scoff at such claims is ostensibly heartening, it is of course possible they're aliens themselves - in which case they would say that, wouldn't they?
While you're pondering that worrying conspiracy theory, and nervously eyeing your workmates, here's another finding which may or may not be significant: men are more likely than women to believe in the extraterrestrial presence (22 and 17 per cent, respectively). We leave it you to draw your own conclusions from the disparity.
By Lester Haines