The cover story this month uncovers the earliest evidence of human influence on the global climate. Also, take a look at how scientists are using computer-simulated social interactions to study the prevention of disease outbreaks. Then, clear up some of the biggest misconceptions about the Big Bang that even some astronomers themselves perpetuate. Plus, take an in-depth look at Nikola Tesla, inventor of the alternating current, and check up on the improving market viability of the hydrogen-powered car.
©2005 Scientific American