Some people assume that there’s a type of beauty that everyone can agree on. But did early humans really admire slender bodies the way we do today? After all, fashions come and go – there’s been plenty of fads throughout history that we find hard to understand today.

The UK’s deputy prime minister, Angela Rayner, recently suggested “beautiful” needs to be removed from the government’s housing policy on the grounds it is too subjective. She said in an interview that “beautiful means nothing really, it means one thing to one person and another thing to another”.

She isn’t alone. Many people support the notion, first stated by the Irish novellist Margeret Wolfe Hungerford, that “beauty is in the eye of the beholder”.

But is this true? The current state of our knowledge on aesthetics, and specifically what we consider beautiful, is a mosaic of empirical discoveries. For over 150 years, psychologists have run carefully controlled experiments to determine whether an attribute, such as a particular colour, shape or melody is beautiful.

Some rules have emerged, but none are universal: for instance, the golden rectangle ratio in geometry, which denotes a rectangle with the height to width being 1:1.6. Although considered beautiful by some in objects such as buildings or windows, these dimensions are an uncommon choice for bathroom tiles or books.

Research has shown that our experiences of finding things visually appealing are an integral, and often unconscious, part of the way we perceive objects in the world........

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