1  fears memorably summed up by the "gray goo" trope.

2  eating their white neighbors' pets-a racist trope dating back centuries.

3 rform seemingly miraculous tasks is a common trope in the annals of science fiction.1 Although severa

4 n is incomplete, leading to the oft-repeated trope that neuroscience has yet to make significant cont

5  the classical conditioning of pea plants to trope toward wind as a sign of light, which seems to be