Responsive Design: How Can I Make Two Column posts on Mobile Version of the Blog

Hi there guys!
Hope you’re OK!

HAve a Question… maybe a big one..
The thing is that I Just want to get a responsiveness post by two columns just like this one: https://www.upsocl.com/

Here you have an image of the way I want it to be seen:

[IMG]https://i62.tinypic.com/o79dnb.png[/IMG]

So.. on each “row” it displays two post not just one ..

Is that alright? How can I do it?

Any suggestion?