I'm using the Twenty Twelve theme and am finding there is WAY too much white space between postings on my blog page. I've already created a child theme, but am not well-versed enough in CSS to find the offending code myself. I've tried changing all kinds of things to no avail.
Here is a link to the page that is driving me crazy: http://happymamahealthybaby.com/articles/
Any help would be greatly appreciated!