Which cryptids are the most scientifically plausible? I wrote off Bigfoot a long time ago, it'd be virtually impossible for a species of 8 foot hominids in North America (a continent with no native ape species, mind you) to go this long without being discovered. Yetis however, I'm more willing to entertain the idea of, but the unstable medium in which their "tracks" are typically found makes most documentation unreliable.