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The plant family tree

9 minutes

Want a whole new body? Ask this flatworm how

5 minutes

ORIGINAL

Dance, dance evolution

4 minutes

Ins holz (In the woods)

13 minutes

H₂O

12 minutes

How our developing understanding of plants changed our knowledge of life itself

With some 7 million dried plant specimens, the herbarium at Kew Gardens in London is one of the largest collections of its kind in the world. Building on the Linnaean system, through Darwin to DNA, scientists there have traced the relationship between plant life-forms and the timeline of their development over the ages – from algae to mosses to flowers. While the plant family tree is thought to be 95 per cent complete, this short documentary reveals that continuing to study plants gives us an important framework for asking questions about how our ecosystems actually work.

Video by Lonelyleap

The blob with a superpower: cut a flatworm in four pieces and watch it regenerate four-fold

Planarians are small flatworms that live in wet and humid areas around the globe. Although these creatures are relatively simple, their small, soft bodies possess one of the most amazing secrets in the animal kingdom. Cut a planarian into as many as 279 pieces and, within a few weeks, each bit will regenerate into a full new worm – head, eyes, digestive system and all. This incredible ability raises interesting questions for philosophers, who might wonder which, if any, of these worms is the ‘original’, and for medical researchers, who are hoping to harness the adaptability of planarian’s powerful regenerative stem cells to help regrow tissue, and potentially even limbs, on humans. Read more about this video at KQED Science.

Video by KQED Science

Producer and Writer: Gabriela Quirós

Narrator and Writer: Lauren Sommer

Dance seems to be the ultimate frivolity. How did it become a human necessity?

Every culture dances. Moving our bodies to music is ubiquitous throughout human history and across the globe. So why is this ostensibly frivolous act so fundamental to being human? The answer, it seems, is in our need for social cohesion – that vital glue that keeps societies from breaking apart despite interpersonal differences. The French sociologist Émile Durkheim (1858-1917) theorised that ‘collective effervescence’ – moments in which people come together in some form of unifying, excitement-inducing activity – is at the root of what holds groups together. More recently, Bronwyn Tarr, an evolutionary biologist and psychologist at the University of Oxford who is also a dancer, has researched the evolutionary and neurological underpinnings of our innate tendency to bust a move. Drawing on the work of both Durkheim and Tarr, this Aeon Original video explores that unifying feeling of group ‘electricity’ that lifts us up when we’re enthralled by our favourite sports teams, participating in religious rituals, entranced by music – and, yes, dancing the night away.

Directors and Animators: Rosanna Wan, Andrew Khosravani

Producer: Kellen Quinn

Writer: Sam Dresser

Associate producer: Adam D’Arpino

Sound designers: Eli Cohn, Ben Chesneau, Maya Peart

Narrator: Simon Mattacks

Surgeons with chainsaws – the breathtaking craft of logging on a Swiss mountainside

In most of the world, logging is now largely the work of massive machinery. But in the steeply sloped woods above Lake Ägeri in Switzerland, a combination of chainsaws, jacks, muscles and gravity is still the most effective means of bringing down trees for lumber. Once every four years, skilled loggers travel to the area to collect mature trees in a sustainable harvesting tradition that, in turn, allows saplings to take in sunlight and flourish. After felling the trees at careful angles, the workers send them careening through the woods with spectacular speed and force until they reach the water below with a satisfying splash. From there, the timber is floated downriver into town. The loggers’ confident expertise masks the immense dangers of the job, which could easily turn deadly in an instant. With stunning cinematography, Ins holz (In the woods) offers a rare look at this nearly extinct practice and the culture that surrounds it, making for a deeply visceral and visually stunning celebration of a hard day’s work.

Directors: Thomas Horat, Corina Schwingruber Ilic

Website: Mythenfilm

A meditative cinepoem from 1929 captures the reflective, ethereal wonders of water

The US photographer and filmmaker Ralph Steiner (1899-1986) is widely considered to be a pioneer of both media, celebrated for his century-spanning work in modernist photography and documentary and avant-garde film. H₂O (1929), his debut short and one of the earliest US art films, is a meditative, visual ode to water in its many forms, focused on the liquid’s various textures and shape-distorting reflective qualities. In a series of static yet dynamic shots, water-spewing pipes and fire hydrants, waterfalls, raindrops, slow-flowing streams, and the shimmering surfaces of near-stagnant bodies appear on screen, with the visuals gradually becoming more abstract as Steiner transitions to closeups of water surfaces. This version of the film features a new original piano score from the Illinois-based composer William Pearson, commissioned by Aeon. H₂O is frequently mentioned alongside another documentary touchstone of the same year: Regen, by the Dutch directors Joris Ivens and Mannus Franken, which celebrates Amsterdam in the rain.

Director: Ralph Steiner

Composer: William Pearson

How our developing understanding of plants changed our knowledge of life itself

With some 7 million dried plant specimens, the herbarium at Kew Gardens in London is one of the largest collections of its kind in the world. Building on the Linnaean system, through Darwin to DNA, scientists there have traced the relationship between plant life-forms and the timeline of their development over the ages – from algae to mosses to flowers. While the plant family tree is thought to be 95 per cent complete, this short documentary reveals that continuing to study plants gives us an important framework for asking questions about how our ecosystems actually work.

Video by Lonelyleap

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Essay/
History of Science
A history of monsters

Monsters once inhabited the mysterious fringes of the known world. In our human-dominated present, can they still be found?

Natalie Lawrence

Essay/
Cognition & Intelligence
The elephant as a person

Elephants might have the necessary capacities for personhood – we just need to help them acquire the cognitive scaffolding

Don Ross