Five things that can be done on earth but not in the space

 Today we will tell about 5 such things that can be done by humans, which can be done on earth but not in space.  Let's start now-

 1. Knowledge of the direction

 credit: third party image reference
 On Earth, directions are easily detected with the help of the Sun and the compass, but this work cannot be done in space.  Ignorance of direction ignores the scientists of spacecraft anywhere.

 2. Rights on Space

 credit: third party image reference
 On Earth, humans have created different countries and states, but this cannot happen in space.  Because according to a treaty in 1960, no country can assert its authority over any part of space, even if it has reached that area earlier.

 3. crying in space

 If you cry in space, your tears will not flow.  Tears will remain in the eyes because gravity is required to fall down, which will not be there.

 4. Talking in space

 You can talk easily on Earth but it cannot happen in space.  Because air is needed to talk, which will not be found there.

 5. Writing with a ball point pen

 You cannot write in space with a ball point pen.  Because the ink of the pen will need a force of gravity to come down that is not present there.