I watched the jet streaming across the sky and wondered at how many people were inside; I wondered where they were going and if they were nervous about speeding along at such heights. How can that plane fly through the same air that we breathe into our lungs? It seems too airy to carry anything.
How does that cruise ship carrying 3,000 people, their vacation stuff and enough food to feed them all, float along on water that I can dip my hand into? I would never have believed it were possible if I had not seen it myself.
How do eyes view their surroundings, perceive everything from colours to fa...