Zed built the Pyramid House in the 70s as an example of an ecological “house of the future”. Its glass walls allowed it to be passively heated, even on overcast days, whilst a series of automatically-opening vents prevented it from getting too hot.
Over the years, the automatic vents had stopped working and some of the glass panels had been smashed and boarded over. But it still worked as an efficient greenhouse. So, when Zed’s body was found in 2006, some months after he died, it was perfectly dessicated. Mummified.