Modern Marvels

World's Strongest (13x45)

Ημερομηνία προβολής: Οκτ 18, 2006

Strength...a powerful word, but what does it mean? How is it measured? Why are some things simply stronger than others. How strong is a rope, a tractor, a diamond, a tugboat or even plastic. How and why strength matther to us every day.