it's very easy to take for granted some of the very amazing things that surround us in particular the notion of life on a day-to-day basis we're used to it we are living things we see living things all around us and we get preoccupied with other things things like doing our homework paying our taxes worrying about what our next meal is going to be but if you just take a moment and I encourage you to actually take that moment right now look in the mirror or look at me in this video we are miraculous organisms in a miraculous biological system each of us is made of trillions tens of trillions of living cells and bacteria that somehow organize together to create Us in these incredibly elegant and complex systems how does that happen how do you get intelligence how do you get sensory perception how do you pass on those traits from one generation to another how do cells replenish themselves what happens when there are mistakes is are mistakes or mutations sometimes a good thing or are they always a bad thing how did life even emerge on as far as we know this planet maybe other planets where do we get our energy from it turns out the Sun but then where do we get that energy from because we're not taking that's that's that solar energy directly how do we get it from other things like plants which are other forms of life and how is all of this interconnected and related this is the focus of this high school biology course and I just have to say you know I'm it's hard people always ask me what's your favorite topic Sal and I'm not going to say it's hard to pick because it's like picking a favorite child but if you don't stop and pause and think about the Wonder of life around us then it just makes life a lot less interesting and if you just pause for that moment and especially if you start to understand as you're going to do in this course then I think you'll just have a little bit more wonder and a lot more understanding of how we fit in the universe