‘Why do we need colours?’ A blind boy and a sighted girl experience a meadow

‘What do you think the grass looks like?’

Two friends – a blind boy and a sighted girl – wander through a meadow, riding their bikes, picking dandelions and doing their best to avoid stinging nettles. Now and then, the girl probes the contours of the boy’s sensory experience, often to his annoyance. After all, how can he explain what it’s like to not know or even understand colours, or why his experience doesn’t require them? Deriving depth and nuance from the simple premise of children at play, the Polish filmmaker Filip Jacobson reflects on the possibilities and limits of communicating subjective experience, as well as the diversity of ways to internalise the exterior world.

The controversial New Age guru who believed self-love healed all – even AIDS

For gay men living with HIV and AIDS in the 1980s, their diagnosis was often accompanied by both fear for their lives and shame for having contracted a highly stigmatised disease. In Another Hayride, the US filmmaker Matt Wolf explores how the US self-help guru Louise Hay (1926-2017) gained an ardent following among HIV-positive gay men in Los Angeles, and then among people experiencing trauma throughout the country, by teaching that they could heal themselves through self-love. The short documentary is built from archival footage – the US talk show hosts Oprah Winfrey and Phil Donahue make cameos – and narration from the US writer and minister David Ault, who attended Hay’s weekly ‘Hayride’ support groups. Through his portrait, Wolf offers a nuanced recollection of Hay and her gospel of New Age healing, in which extraordinary compassion and magical thinking both played central roles.

Ums, likes and y’knows get no respect – but they’re vital to conversation

If you’ve ever listened to a recording of yourself speaking, the frequency with which you used fillers such as ‘um’, ‘uh’, ‘like’ and ‘y’know’ might have grabbed your attention – and perhaps your scorn. Indeed, these verbal hesitations have been viewed as undesirable since the days of ancient Greece and, more recently, the American linguist Noam Chomsky characterised them as ‘errors’ irrelevant to language. But could there be more to these utterances than initially meets the ear? In this short animation from TED-Ed, Lorenzo García-Amaya, assistant professor of Spanish at the University of Michigan, reveals how ‘filled pauses’ can give conversation partners important context clues, communicate emphasis, help tether related thoughts together, and so much more.

The ‘dangerous nonsense’ of phrenology shows how pseudoscience takes hold

In the 19th century, the Viennese physiologist Franz Joseph Gall placed a formidable thumb on the scales of the ‘nature vs nurture’ debate when he proposed a simple – and, as we now know, false – solution to the age-old conundrum. Everything you need to know about someone’s character, he argued, could be predicted by the shape of different brain regions – and by extension, the contours of their head. That phrenology, as it became known, was built on conjecture rather than empiricism was clear to a great many scientists of the era. Still, it caught on in the public consciousness, and often with sinister consequences. This animation from BBC Reel provides a brief history of phrenology, shedding light on why facile solutions often gain traction over rigorous empiricism, and how pseudoscience can sometimes open gateways for the real thing.

A samurai rulebook offers guidance on how to kill enemies and refrain from gossip

From the 10th century till their abolition in the 1870s, samurai were a class of Japanese military nobility who inherited lives as warrior protectorates (bushi) for feudal lords, and had a notoriously strict and intricate honour code. This video from the YouTube channel Voices of the Past explores two scrolls from the famed samurai school Natori-Ryu’s 17th-century rulebook. The first scroll has codes of conduct for peacetime, with guidance ranging from the universal, such as the pitfalls of talking behind someone’s back, to the extremely samurai-specific, such as keeping a home garden that doesn’t leave you vulnerable to enemy attack. The second scroll lays out the rules of engagement in wartime and paints a much more violent portrait of samurai life, built around intricate rules for killing and being killed. These primary sources offer an intriguing window into the samurai value system, in which loss of reputation was considered a fate far worse than death.