A winter painting of hunters with dogs walking down a snowy hill toward a village, with people skating on frozen ponds below. — Hunters in the Snow, painted by Pieter Bruegel the Elder in 1565.
Image: Pieter Bruegel the Elder, Hunters in the Snow (1565), Kunsthistorisches Museum, Vienna · Public domain

A Knaph story

The Story of Temperature

How people learned to put a number on hot and cold

c. 170 CE – today

A hand fooled by a bowl of water, a glass bulb in a doctor's mouth, a frozen salt mixture and a scale with no bottom: how people learned to measure how hot things are, and then what heat really is.

A Knaph story

How people learned to put a number on hot and cold

c. 170 CE – today

A hand fooled by a bowl of water, a glass bulb in a doctor's mouth, a frozen salt mixture and a scale with no bottom: how people learned to measure how hot things are, and then what heat really is.