Historically, scientists studying the brain, like neuroscientists and psychologists, worked separately from those studying the body, such as endocrinologists and physiologists. Research on how the nervous system interacts with the body has been growing, but “it kind of stops there, rarely making it past the neck to reach the brain again”, as Carlos Ribeiro puts it. Neuroscientists, meanwhile, often focus on higher brain functions without considering how body signals might influence them.

Fermented clues

Cheese and chocolate might not tempt a fruit fly’s palate, but to a hungry fly short on nutrients, their smell carries a hidden signal. When deprived of certain amino acids – the building blocks of protein – these tiny insects develop a surprisingly refined sense of smell that helps them track down not just food, but specific bacteria living in fermented foods.