Order a MySQL table by two columns

How do I sort a MySQL table by two columns? What I want are articles sorted by highest ratings first, then most recent date. As an example, this would be a sample output (left # is the rating, then the article title, then the article date) <pre> +================+=============================+==============+ | article_rating | article | article_time | +================+=============================+==============+ | 50 | This article rocks | Feb 4, 2009 | +----------------+-----------------------------+--------------+ | 35 | This article is pretty good | Feb 1, 2009 | +----------------+-----------------------------+--------------+ | 5 | This Article isn't so hot | Jan 25, 2009 | +================+=============================+==============+ </pre> The relevant SQL I'm using is: ORDER BY article_rating, article_time DESC I can sort by one or the other, but not both.