Why do we go to work when the Sun is up and shining? Why can't we sleep when the Sun is up and go to work when the Sun is down?
Well, long time ago...electricity wasn't invented yet...so going to work during the daytime is inevitable. But now with all those skin cancer/diseases and heat stroke and fatigue threatening us in every corner aspects of our health, can our modern lifestyle be altered to protect ourselves from those deadly Sun's rays?
I think many people do feel more energetic during the nightfall and extremely sleepy during the mornings and afternoons. So...could that be a sign that it is now time for us to change our lifestyle?

Please comment. Thanks.
