From Aristotle’s musings on the nature of time to Einstein’s theory of relativity, humanity has long pondered: how do we perceive and understand time? The theory of relativity posits that time can stretch and contract, a phenomenon known as time dilation. Just as the cosmos warps time, our neural circuits can stretch and compress our subjective experience of time. As Einstein famously quipped, “Put your hand on a hot stove for a minute, and it seems like an hour. Sit with a pretty girl for an hour, and it seems like a minute”.

In CheckUp #14, we talked about the different types of cancer treatments with ionizing radiation: internal and external radiotherapies. We promised we would return to this subject to talk in more detail about a special type of internal radiotherapy: molecular radiotherapy. This activity is integrated in Nuclear Medicine, a medical specialty that, in Oncology, uses radiopharmaceuticals to diagnose, treat, and evaluate the response of cancers to existing or new drugs.