The dog days of summer are upon us. Or so the ancient Romans named the dies caniculares that followed the rise of the “dog star” Sirius which the ancients believed to signal the oncoming sweltering heat and drought of summer.

As succinctly summarised by Stoic philosopher Seneca the Younger “summer returns, with its heat; and we must sweat”. Summer is that time of year in which the soporific heat of the sun reverberates down upon bodies languorously lying out in the open air of the public pool, park or beach, a cold drink in hand as one tries to beat the heat.