Van Allen Belt
From Tardis Wiki, the free Doctor Who reference
The Silurians tried destroying Earth's van Allen Belt using their molecular disperser so that the Sun's radiation would burn the humans to death whilst allowing the cold-blooded Silurians to survive. Liz Shaw overloaded the Silurians' disperser to stop them. (TV: Doctor Who and the Silurians [+]Loading...["Doctor Who and the Silurians (TV story)"])
