He said the Earth is like a large mechanical device that will survive only if people living on it know how to operate it correctly.

VOA: special.2010.05.30

What and how the Japanese eat, he says,explains why they are the healthiest people on earth.

VOA: standard.2010.02.23

And if all of the possible brackets were filled out on standard paper and stacked on top of each other, how big would the pile be?" It would actually go from the earth to the moon and back,1.1 million times,".

VOA: standard.2009.03.25