A leading space scientist is warning that small asteroids from space that detonate like bombs as they crash into Earth's atmosphere might accidentally set off a nuclear war.
An outbreak of foot-and-mouth disease could cost US$27-billion in the United States alone, says Corrie Brown, a veterinary pathologist at the University of Georgia, who has spent years researching agroterrorism scenarios.
Margaret Munro sifts through the hype surrounding nanotechnology advances and possibilities and examines some of its more practical near-term applications such as "curing cancer and creating bricks that can sense changing weather."
Scientists will soon be able to create viruses that never existed before, and bring extinct horrors such as smallpox back to life, says a leading geneticist who is working to create life from scratch.