We can’t explain why it’s such a feel-good experience to watch Marie Kondo help strangers clean their houses, but science can help explain why decluttering your own home can bring you a little extra happiness. According to this article, clutter makes us less productive, reduces our working memory, negatively impacts sleep, makes us feel more stressed and anxious, and might even make us more likely to reach for junk food. So whether you go for a full KonMari cleanout or just neaten up the living room, tidying might bring you some real benefits.