You walk into your shower and see a spider. You don’t know whether it is venomous—or whether it is even a real spider. It could be a personal surveillance mini-drone set loose by your nosy next-door neighbor, who may be monitoring the tiny octopod robot from her iPhone 12. A more menacing possibility: Your business competitor has sent a robotic attack spider, bought from a bankrupt military contractor, to take you out. Your assassin, who is vacationing in Provence, will direct the spider to shoot an infinitesimal needle containing a lethal dose of poison into your left leg—and then self-destruct.
Meanwhile, across town, an anarchist molecular-biology graduate student is secretly working to re-create the smallpox virus, using ordinary laboratory tools and gene-splicing equipment available online. Not content to merely revive an extinct virus to which the general population has no immunity, he uses public-source academic research to make it more lethal. Then he infects himself and, just as his symptoms start, strolls around the airport to infect as many people as he can.