why it dosen't happened?????

1*when we are in moving bike why didn't it fall????????

2*why it is not easy to forget who we loved most????

3*why don't we know how much storage memory we had in our brain????

4*what is the speed of our imagination/dreams???

5*why don't we know what be their after our death???

6*why we are giving high important to money????

7*why can't we guess what was going on tommarow????

8*why natural disaster occuring???