With a roar as loud as the T. rex's in Jurassic Park, who knows how many female alligators would slink their way over. Put it all together and you get that soul-shuddering sound.

Tsutsui first heard the infamous roar of the radioactive monster lizard when he was 8 years old, living in the tiny college town of Bryan, Texas. Enlarge this image.

This illustration of Modigliani’s nose-horned lizard was made in 1933 based on the original lizard first found in 1891. That specimen turned pale blue due to how it was preserved.

The lizard, most likely a monitor lizard, is seen in the 40-second video trying to literally knock at the home's door and scratch at it by finding a way to get into the house while standing on a ...