Firstly, thank you to 'rbochet' and 'comete' for their scripts to download National Geographic wallpapers!
Unfortunately they doesn't work until October 2011 and this is why I've created a new version.
Simply launch the script to download wallpapers of the current month: ./NGwallpapers.sh
If you want to download all wallpapers for a few months, you can use this command ./NGwallpapers.sh YEAR MONTHS (e.g. ./NGwallpapers.sh 2011 10 11 12 to download all wallpapers for October, November and December 2011)
Wallpapers are downloaded in the new NGwallpapers folder.
You are welcome! Fork this repository ;)