  Existence of arrow of time in our world may be easy explained if time has
multifractal nature. The interpretation of nature of time arrow is made on the
base of multifractal theory of time and space presented at works
\cite{kob1}-\cite{kob15}. In this paper shown possibility to walk to and fro in
space and necessity of huge amount of energy for stopping time and changing
direction of it in microscopic volumes.
  Contents: 1. Introduction 2.Universe as Time and Space with Fractional
Dimensions 3. Why Time has Direction Only to Future and Why Impossible to Walk
in Time To and Fro? 4. Is It Possible to Change Direction of Time and How Much
Energy It Needs? 5.How Much Energy Needs for Stopping Time and Moving it Back
in the Volume of Cubic Centimeter During One Second? 6. Why We Can Walk To and
Fro in Our Space? 7. Conclusions

General Physics