Do you think organisms /plants and even humans emit radiation ?
this is defintion of radiation below from wikipedia :
Clearly organisms dont emit radiation but there is a question here to all : There could be undiscovered radiations from the body which we have not been able to quantify.
Historically electro magnetic radiations were predicted theoritically and
then later on many years they were actually discovered.
I must say there could be an alternate science for measuring those radiations.