Sleep flushes your brain

Study shows that the brain , in effect, fills with toxic stuff that sleep flushes away. So get yourself to bed and dream your dreams.
If this study is true, I fear what a cat is thinking about during the day, seeing how it needs 20 hours of sleep a day to flush away all it's toxicity.

http://www.doctorshangout.com/profiles/blogs/one-of-the-biggest-scientific-breakthroughs-in-2013-the-real