“EMom, why do cats love boxes so much?”
The prevailing theory is that cats love boxes for the same reasons that they prefer other enclosed spaces: an evolved desire for safe, secure places to rest that help to contain their body heat.
http://www.myemom.com/why-do-cats-love-boxes-so-much/
Why do cats knead? It’s believed that cats knead to mark territory as theirs; scent glands in a cat’s paws release a distinctive scent onto the (typically soft) object being kneaded, be it a couch cushion or your lap. http://www.catster.com/cat-behavior/why-do-cats-knead
What is the average lifespan of a rabbit? Depending on breed and care, a domestic rabbit can live anywhere from 6 to 12 years. http://www.rabbit.org/fun/answer1.html