New 3D printers are beginning to play a major role in developing new technologies - George Putich tells us how surgeons are now using them to help plan heart surgeries. Speaking of new technology we'll hear how US Law enforcement officials use powerful cameras to scan license plates and build databases on the movements of millions of Americans. And, we talk with a researcher whose team has just discovered a correlation between climate shifts and human behavior - the study reveals that these deviations tend to make people more violent. This and more are coming up for you on VOA's science, health and technology magazine, "Science World."