Taken from the August 2021 issue of Physics World where it first appeared under the headline "Hot topic". Philip Ball reviews Einstein’s Fridge: the Science of Fire, Ice and the Universe by Paul Sen Energetic ideas Thermodynamics can explain wide-ranging physical phenomena, from melting ice cream to evaporating black holes. (Courtesy: iStock/john shepherd) Like many science writers, I have often adopted the conceit that quantum mechanics and general relat You’ve reached the limit of what you can view on Physics World without registering If you already have an account on Physics World, then please sign in to continue reading If you do not yet have an account, please register so you can Access more than 20 years of online content Choose which e-mail newsletters you would like to receive Want to read more? Registration is free, quick and easy Note: The verification e-mail to complete your account registration should arrive immediately. However, in some cases it takes longer. Don't forget to check your spam folder. If you haven't received the e-mail in 24 hours, please contact customerservices@ioppublishing.org. E-mail Address