The Sky Above Us
If you have ever looked up at the sky on a clear night, you have seen more stars than you can count. It gives you some sense of how large our universe is and might even make you feel like Earth is pretty small. Looking at the sky is one of the oldest activities known to man. Just about every ancient civilization had its own myths about what the stars mean. The passing of days, months, and years has long been tracked by the rising and setting of the sun, the phases of the moon, and the changing of the seasons.
The sky is blue and sunsets are red because of the way air breaks sunlight into colors. That fact alone is pretty fascinating. But for many of us, it's hard to imagine that air is made up of anything. You can't see it, you can't taste it, and you can only feel it when it moves. It makes you wonder whether air is really there like everyone says it is.
When are scientists the smartest?
During the day, because when the sun shines everything is brighter!