Unheard secrets of space.
Friends, the most expensive place made by us humans is the international space station.
Do you know how difficult it is to live in this space station?
Here the astronaut has to do all the work that the common man does on earth.
But where the biggest problem is gravity.
Like on earth we use toothpaste for brushing.
But a jelly-like liquid is used in space. Which sticks perfectly to the brush.
And the trouble is that usually we spit it out after brushing. But doing so in space can be very harmful.