A 2012 PLOS Biology article by J. Rosindell and L.J. Harmon, entitled OneZoom: A Fractal Explorer for the Tree of Life, explains the concept behind this cool and addictive new evolutionary tool.
With OneZoom, one may explore any part of the tree of life, from an individual organism to a entire clade. I recommend choosing your favourite lifeform as a starting point, then seeing where evolution leads you. To adapt Ira and George Gershwin's cryptichthyic 1937 song Slap that Bass,
Click that bass
Click away your trouble
Learn to zoom zoom zoom
Click that bass
But beware: once you dive into OneZoom, you may find it difficult to stop exploring biodiversity.