mind-boggling

When you talk about midtown Manhattan as being a commercial backwater, I find it mind boggling.

Science allows for the unlikely, the extremely rare, the mind-boggling—but it does not allow for the impossible.

The forests, with their mind-boggling biodiversity, are a staggering 10,000 times older than those of North America and Europe.

The notion of “good bacteria” is now familiar, as is the mind-boggling variety of different bacteria we have in and on us.

Seaman's mind-boggling dereliction of responsibility harms the state whose interests he was, and is, tasked with protecting.