Sarah Zhang

Author Archive

  • Sep 8, 2021
    When London vanquished cholera in the 19th century, it took not a vaccine, or a drug, but a sewage system. The city’s drinking water was intermingling with human waste,...
  • May 16, 2021
    In 1975, scientists tried spaying a few hundred female betta fish. We all know what happens to spayed cats and dogs: They become sterile. Betta fish are different. A third of the...
  • Mar 19, 2021
    A dead whale can mean many things, but to sharks, it means a feast. This is the scene Chip Michalove encountered on March 4, when he saw the dead right whale bobbing in the ocean,...
  • Feb 10, 2021
    Let’s begin by defining our terms. Herd immunity is the hazy, long-promised end of the pandemic, but its requirements are quite specific. Jennie Lavine, a biologist at Emory...
  • Jan 19, 2021
    For most of 2020, the coronavirus that causes COVID-19 jumped from human to human, accumulating mutations at a steady rate of two per month—not especially impressive for a...