http://www.newscientistjobs.com
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ALL JOBS LISTED BY DATE:
http://www.newscientistjobs.com/jobs/search/searchresults.aspx?keywords=&sortBy=Date&sortdir=Descending&page=1&pageSize=10&cat177=2114
http://www.nature.com
http://www.nature.com/naturejobs/science/searches/all?page=1&sort=date&order=descending