NXS claims to be the first 3D blockchain system. Their protocol utilizes three consensus channels to adapt to transaction volume, use trust to secure the platform and determine the most efficient use of network resources. They also have some lofty plans to introduce satellites to space to further work toward the decentralization of their network!
They have partnered with Vector Space Systems, co-founded by Jim Cantrell, formerly of SpaceX. It's a very fascinating project, and while I do have some reservations about whether or not they will be able to achieve the massive goals they've set in place, I'm still very much hoping that they have success. Your Nexus Investment could become very important in the lives of many people all over the world.
You can buy Nexus on a least one large exchange, and a few smaller players as well. While there are a few trading pairs, Bitcoin is the only one that carries significant liquidity. You'll likely need to utilize this pair to make your trade within a reasonable time frame and to achieve a fair price point.
The best places to store your NXS coins is by using the official wallet. You can download this from the coin's website. They have made available an installation package for Windows, Mac, and Linux operating systems.