Dhruv Khullar

The United States, for much of its history, was less an engine of scientific progress than a beneficiary of it. Pasteur, Koch, Lister, Mendel, Curie, Fleming—the giants who midwifed modern medicine were not Americans but Europeans. During the Second World […]

On March 2, 2016, at around 9 A.M. local time, in Kazakhstan, Scott Kelly plunged through the Earth’s atmosphere in a Soyuz spacecraft travelling at seventeen thousand miles an hour. As expected, atmospheric friction warmed up its heat shield so

In 2018, two children in Samoa died after receiving measles vaccines, because the nurses who administered them had mistakenly mixed the vaccine powder with a muscle relaxant. Local vaccine skeptics seized on the tragedy, and the government temporarily suspended its

A couple of weeks ago, Donald Trump turned in one of his strangest performances in a campaign with no shortage of them—part of a series of oddities that may or may not constitute an October surprise but has certainly made

When I first became a doctor, I cared for an older man whom I’ll call Ted. He was so sick with pneumonia that he was struggling to breathe. His primary-care physician had prescribed one antibiotic after another, but his symptoms