Take an extraordinary journey through the discoveries that have transformed our world, and our lives, forever. What would life be like without cars, refrigerators, the Internet, or the omnipresent smartphone? Learn about the discovery of the most important inventions that have influenced the contemporary world, from the end of the nineteenth century to our own time. They include innovations in technology, such as alternating current, plastic, and the robot; communications (cameras, radio, cinema); medicine, from aspirin and penicillin to x-rays and the pacemaker; and transportation. See what secrets and events led to their creation and meet the exceptional figures who conceived them.