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- Mon May 28, 2007 6:41 pm
- Forum: The Bridge: Discuss an Astronomy Picture of the Day
- Topic: A Hole in Mars (APOD 28 May 2007)
- Replies: 109
- Views: 38411
A Hole in Mars
I log on to APOD daily and enjoy the photos and descriptions posted. While some are quibbling about a probable typo (were). As a former caver, you have committed one of my favorite redundancies -- "underground cave." Is there any other kind of cave? Otherwise, keep up the good work.