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A term introduced by the Baltic German biologist Jakob von Uexküll in 1909, Umwelt refers to an organism’s internal and limited perceptual experience of the external world. This stunning experimental exploration of the concept from the Japanese artist Yoshiyuki Katayama contrasts flowers blooming at time-lapse speeds with insects and spiders atop them, captured in real time. As these two organisms move at what appear to be similar speeds, the viewer is reminded of the disparate timescales on which they usually operate, and the very different evolutionary goals that they pursue even as they interact with one another.
Director: Yoshiyuki Katayama
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Animals and humans
One man’s quest to save an orphaned squirrel, as narrated by David Attenborough
14 minutes
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Biology
Butterflies become unrecognisable landscapes when viewed under electron microscopes
4 minutes
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Cognition and intelligence
A father forgets his child’s name for the first time in this poetic reflection on memory
4 minutes
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Biology
‘Save the parasites’ may not be a popular rallying cry – but it could be a vital one
11 minutes
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Evolution
The many ways a lizard tongue sticks, grasps, pinches and plops – in slo-mo
6 minutes
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Biology
Starlings swoosh like brushstrokes across the sky in this dazzling short
3 minutes
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Ecology and environmental sciences
The tree frog die-off that sparked a global mystery – and revealed a dark truth
15 minutes
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Ecology and environmental sciences
GPS tracking reveals stunning insights into the patterns of migratory birds
6 minutes
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Neuroscience
This intricate map of a fruit fly brain could signal a revolution in neuroscience
2 minutes