Although many people think of science as only relevant to whitecoated intellectuals tucked away in laboratories, in fact, scientific knowledge explains the everyday world. The amazing discoveries of years gone by have become part of the accepted environment of today. For example, the invention of the voltaic battery by Alessandro Volta was a huge breakthrough in 1800, but nowadays we flick many switches a day, and take for granted the electricity that powers our lights, ovens, televisions, etc. Scientifica tells of the discoveries and inventions that led to modern technology, explains the fundamental concepts of many scientific principles, and also examines the physical world, from the stars above to the ground below. With our increasing understanding of our environment we can learn to preserve our natural resources for the future. The information presented throughout the pages of Scientifica will enhance our appreciation of the marvels of nature and increase our understanding of the technology that surrounds us.