At they time they were killed. none of the Graboids in Tremors 1 had yet started the metamorphic process which leads to Shriekers forming inside its body. So there was no sign of Shriekers in the T-1 Graboids studied by Rhonda and other scientists, and no hint that this is how they reproduce.
If after Tremors 1 the Graboids’ bodies were sent off for scientific study, why wouldn’t the scientists have discovered Shriekers inside them BEFORE Earl and Grady ever got to Mexico? was last modified: August 22nd, 2015 by
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