Seismologist Paul Richards says that scientists can now detect any nuclear test of military significance, no matter how secret. He feels nuclear weapons can be controlled.
The concept of saving face is so ingrained in the Japanese culture that its homeless population will do anything rather than the humiliation of asking for help.
Strickland said, " The specific idea was to incorporate nano sensors into pesticide spray, so that you can monitor how well the crop field was sprayed for pests, or while adding nutrients to the crop field."
Rosalyn Berne studies the ethics of nanotechnology. She said we don't understand what happens to nano products used in agriculture, at the point when that product filled with nano particles washes into the soil.
Cary Fowler, executive director of the Global Crop Diversity Trust, talks about a large and ambitious saving seeds from extinction program that aims to safeguard the future of global agriculture.
Experts say usable oil can be extracted from a rocky substance, called oil shale, that's abundant in western North America. But geologist Craig Cooper speaks of trade-offs in the energy and water extraction process.