It's About Time!It's About Time!

"Why are there 60 minutes in an hour and 24 hours in a day? Humans throughout history have been fascinated by the mysteries of time. Highlighting key scientific concepts and discoveries . . . Brown explores the ways time is measured and shows why the idea of it slowing down or speeding up can be more than a feeling. He ponders its beginnings... and end! Narrated by Albert Einstein, 'It's about time!' helps kids understand the passage of time, and why it's the one thing that really can't wait."-- Page 4 of cover.