A lot has changed in the field of cat science since Paul Klusman and his assistant TJ Wingard released the first Engineer's Guide to Cats all the way back in 2008.

To expand on their seminal work, and just in time for Christmas, Klusman and Wingard have released a very necessary update to the original instructional video: An Engineer's Guide to Cats 2.0.

Marvel at the phenomenon known as "Aspect Ratio Drift" (or, in layman's terms, "Cat Get Fat"); wonder at the newly discovered gravity-related cat affliction called "Costume Induced Sideways Cat Instability Syndrome"; and gaze in awe as cat yodelling is brought into the second decade of the 21st century with the help of autotune.

For science!

[H/T: MetaFilter]