reporters simply amaze me
gotta love how they think that there are 13 magical servers handle all of the traffic on the internet
good to know there are only 13 ISPs in the world each with only a single server that they connect their customers to
there are 13 IP Addresses used for providing the root zone for DNS resolution (fuck all to do with routing traffic), most of those IP Addresses direct to multiple servers in several countries each with multiple internet connections, only some of them are assigned to only a single computer, losing a couple of them is hardly a problem, as long as 1 of the many systems is online things run perfectly normally.
in the event that all of the servers for all of the IP Addresses are offline, it would be around 2-3 days before there would be any major problem with DNS resolution for users (as all they do is tell recursive resolvers who is in charge of each TLD, and your ISP doesn't need to ask who controls .com 50 times a second - it's not going to change that quickly!)... which is more than enough time for at least 1 to be brought back online
there are no details of what was attacked (just the same so-called news copy/pasted on 193 different "news" websites - exact same wording on every one) but it appears there was a small attack that knocked out 2 of the root servers that aren't managed well (both of the ones claimed to have been knocked out by a few Mbit of traffic, and both manage the IP Address at only a single site with no backups or redundancy)
there is also mention that the attack was actually directed at ultradns who handle the .org TLD, they have fewer servers without the sort of resources of the root servers (the root servers are handled by 13 large organisations, most bigger than ultradns), they may have suffered a partial outage which wouldn't cause a problem, or a full outage - which would cause a problem only for users trying to access .org domain names (i've not noticed anything so doubt that)