Jonathan Esquivel sculpts an alien.
Here's a time-lapse of my last sculpting session, using Dynamic Topology. Dirty Vertex Colour to enhance detail and Cycles as the render engine. Took me about 2 hours to complete the sculpt, and some simple materials for the cycles render.
There are a few of my other time-lapses in my youtube channel, if you're willing to watch them, and a more sculpts in my Facebook page :)