Click on "OPEN PETITIONS" above, and you'll see there are currently only two options:
1. All Petitions - by the date/time they are posted after acquiring 150 signatures, with the most recent first.
2. Popular - by signature totals, with the highest number first.
Whereas these two types are the main ones used by most other petition sites, and might be sufficient under normal circumstances, a site with 30-day expiration dates needs a list that enables us to quickly see when each petition will expire.
Most of us lead busy lives, after all, and just don't have much time to spare for reading, researching, and signing petitions. This new list would make it easier for us to focus on petitions that still appear to have a good chance of acquiring enough signatures to guarantee a response.