The shirt reads: “A CHEMIST FROZE HIMSELF AT −273.15°C. EVERYONE SAID HE WAS CRAZY, BUT HE WAS 0K.”
Set in plain white and blue capitals with the temperature picked out in blue. There is no illustration.
Minus 273.15 degrees Celsius is absolute zero, which is nought kelvin. The punchline is not okay — it is 0 K. It is a joke that only resolves if you know the unit, and it is printed without a single hint.
For chemists, physicists, science teachers, and anyone who has told this one at a party and had to explain it.
