"The radiation has destroyed the functional capabilities," explained Spock.
Investigators believe the catheter came loose because the continuing radiation destroyed the tissue holding the device.
The radiation destroys the bacteria that are keeping the aliens unconscious.
The radiation emitted from the capsule destroys the tumor.
Even if it did, it wouldn't matter; the radiation has completely destroyed the biosphere.
However, radiation destroys the cells in the thyroid gland.
The radiation would destroy her-and us, too, if we were in her air capsule.
Clearly any radiation intense enough to destroy the creatures would also destroy the people.
In a few cases, the radiation destroys a section of the electronics (single-event latchup).
In high doses, radiation destroys cells or keeps them from multiplying.