As you may know, Blender is a powerful suite for animation, modeling, interactive creation, post-production with support for a lot of file formats.
The latest unstable version available is Blender Edge, which has been recently released, coming with changes. For information about this release, see the release notes.
The latest Blender versions are available via some third party PPA, so installing the software on Ubuntu is piece of cake. Just add the PPA to your system, update the local repository index and install the blender package:
$ sudo add-apt-repository ppa:thomas-schiex/blender
$ sudo apt-get update
$ sudo apt-get install blender-edge
Optional, to remove blender, do:
$ sudo apt-get remove blender-edge
The installation instructions should work on Ubuntu 15.10 Wily Werewolf, Ubuntu 15.04 Vivid Vervet, Ubuntu 14.04 Trusty Tahr and derivative systems like Linux Mint 17.3 Rosa, Linux Mint 17.2 Rafaela, Linux Mint 17.1 Rebecca, Linux Mint 17 Qiana, Elementary OS 0.3 Freya and other Ubuntu derivative systems.