Renee Zhao holds up milli-spinner device for spinning away blood clots. August 2025.
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This tiny robot spins blood clots away

CNN catches up with Stanford University assistant professor Renee Zhao, who has helped develop a micro magnetic device called the milli-spinner that she hopes could one day revolutionise treatment for stroke patients.

2:37 • Source: CNN
Tech For Good 7 videos
Renee Zhao holds up milli-spinner device for spinning away blood clots. August 2025.
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This tiny robot spins blood clots away
2:37
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• Source: CNN
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This AI-enabled drone can help spot wildfires
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This is where Hong Kong’s top rescue experts train
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This drone could one day help save lives in remote areas
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Magnecko robot, Switzerland, Arche event, 2025.
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Magnecko and RoBoa: rescue robots are here
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Hawk from the University of Oxford wears a tech backpack made by students. May 2025
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This ‘backpack’ is unlocking how hawks see the world
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Robot tortoise made by students at DGIST in South Korea. July 2025
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Robot snakes and tortoises? Meet the reptiles of the future
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• Source: CNN