So Erich Fischer and Reto Knutti at the Institute for Atmospheric and Climate Science
in Zurich,
Switzerland,
took a bird's-eye view of how human activity is changing the planet.
Using 25 different climate models,
they calculated how of unusual events
– such as a 1-in-100 day temperature high or a 1-in-10,000 day rainfall event –
have changed with the rise in global temperatures.