Michael Specter

If there is anything more frightening than the threat of global nuclear war, it is the certainty that humans not only stand on the verge of producing new life forms but may soon be able to tinker with them as if they were vintage convertibles or bonsai trees.

Much of modern molecular biology and microbiology has been based on the effort to decipher the basic code of life, which is made up of four nucleotides: adenine, thymine, cytosine, and guanine.

Now, as the world's scientists focus with increasing intensity on transforming the genetic codes of every living creature into information that can be used to treat and ultimately prevent disease, Shenzhen is home to a different kind of factory: B.G.I., formerly called Beijing Genomics Institute, the world's largest genetic-research center.

When people say they prefer organic food, what they often seem to mean is they don't want their food tainted with pesticides and their meat shot full of hormones or antibiotics. Many object to the way a few companies - Monsanto is the most famous of them - control so many of the seeds we grow.

Daily vitamins are of no value.

Universal vaccination may well be the greatest success story in medical history.

I started to write about science and medicine at the 'Washington Post,' in the early days of the AIDS epidemic.

Even a two-degree climb in average global temperatures could cause crop failures in parts of the world that can least afford to lose the nourishment. The size of deserts would increase, along with the frequency and intensity of wildfires.

One morning every spring, for exactly two minutes, Israel comes to a stop. Pedestrians stand in place, drivers pull over to the side of the road, and nobody speaks, sings, eats, or drinks as the nation pays respect to the victims of the Nazi genocide. From the Mediterranean to the Dead Sea, the only sounds one hears are sirens.

Although it may seem callous to say so, millions of Americans are lucky that Magic Johnson was infected with H.I.V. There is no way of calculating how many lives he has saved. No advertising agency could have invented a better, or more effective, role model.

Lyme disease is the most commonly reported tick-borne illness in the United States, and the incidence is growing rapidly. In 2009, the C.D.C. reported thirty-eight thousand cases, three times more than in 1991. Most researchers agree that the true number of infections is five to ten times higher.

Just because you read a report in the 'New York Times,' the 'Economist,' or, yes, 'The New Yorker' doesn't make it true. But we do know that a few people have evaluated that story with what strikes me as fairly objective standards of reason.