PopSci Recipe Download Error

[cityzen]

Hi All
When i download PopSci I get this

Failed feed: Cars
<httperror_seek_wrapper (urllib2.HTTPError instance) at 0x5b8b928 whose wrapped object = <closeable_response at 0x5b92c38 whose fp = <response_seek_wrapper at 0x5b92788 whose wrapped object = <closeable_response at 0x5b92968 whose fp = <socket._fileobject object at 0x05B8A8F0>>>>>

And it just keeps going all the way to the end.

Any ideas where this would be going wrong?

Fred