Everyone needs a nemesis. Or do they? Social media is abuzz with the idea. And history is full of arch rivals who pushed each other to be better, or drove each other to death.
#Nemesis: ‘better than a friend or a lover’

Glossary
Roxane Gay - The author of several books - most famously, Bad Feminist, a collection of essays on feminism.
Study - The study conducted two tests on 50 students. At the beginning of the experiment, half were given a cup of tea, and half a glass of water. The groups were then given creative challenges, like coming up with a "cool" name for a noodle restaurant.
Renaissance Florence - A period of European history between the 14th and 17th centuries. It was a time of artistic and scientific discovery, much of it taking place in Italy. Leonardo da Vinci and Michelangelo both criticised each other's work, and both were hired to paint the walls of the Palazzo Vecchio in Florence, in competition with each other.
ACDC - Not the rock band! AC stands for "alternating current", Tesla's idea for an electrical charge which changes direction. DC is "direct current", Edison's preferred option in which the charge flows in one direction. Now, both types are used for different things.
Cousins - Mary was the granddaughter of one of Henry VIII's sisters. The pair were queens of England and Scotland at the same time.