Why you’re so tired

year after year more of us are quietly asking the internet why am I so tired searching for answers to something we all feel but don't really understand every morning we're waking up feeling a little bit more worn out than we were the day before our afternoon slumps are a little slumpy so much so that

companies make fun of us for this what's going on it's a 300 p.m. slum selling us meat or cheese or coffee or human gray jet fuel to somehow cure our afternoon energy deficit now listen this isn't a video where I'm going to tell you to just get more sleep or to stop looking at your phone before bed

which all of those things you should do but I want to approach this question a little differently I want to look at the bigger reasons why we're all so tired a lot of those reasons have to do with what's happening right now during the day like right now while I'm filming this things are happening in my brain

and your brain that will make us more tired later on today and tomorrow it will affect how long and how well you sleep and whether or not you feel refreshed in the morning [Music] in order to understand why you're so tired I'm going to take you back in time to 300,000 years ago meet Johnny caveman Johnny caveman

kind of has a similar body to ours today he's a human his body's a little different his hips and his head are shaped a little differently he's got this whiter flatter nose he's got this big strong brow but up where it counts his brain is very similar to our brain today and yet how he uses his brain is

very different similar brains totally different worlds to show this let me show you Johnny caveman's morning routine as Johnny caveman begins his day let's keep an eye on this part of his brain this is the prefrontal cortex when you make decisions this part of your brain is doing most of the work this