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The womb isn’t as welcoming a space for a developing offspring as you might imagine. Indeed, from the moment an embryo is implanted in the mother’s womb, her immune system views the foreign body as something of an invader. Thereafter, the relationship between mother and developing baby is at least partially defined by a biological war over resources. In this clash, the placenta serves as a life-giving intermediary between mother and offspring, allowing for the transport of nutrients while keeping blood supplies entirely separate. With a surrealist-inspired touch, this animation by Diana Gradinaru for the Royal Institution of Great Britain traces the many functions of this fascinating, essential and short-lived organ, as well as its viral evolutionary origins.
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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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Computing and artificial intelligence
A future in which ‘artificial scientists’ make discoveries may not be far away
9 minutes
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Earth science and climate
Images carved into film form a haunting elegy for a disappearing slice of Earth
3 minutes
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Biology
Butterflies become unrecognisable landscapes when viewed under electron microscopes
4 minutes
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Engineering
Can monumental ‘ice stupas’ help remote Himalayan villages survive?
15 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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Animals and humans
Join seabirds as they migrate, encountering human communities along the way
13 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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Metaphysics
What do past, present and future mean to a philosopher of time?
55 minutes