BBC Inside Science

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A method is described for the manufacture of pivoting colloidal assemblies comprising rotating diamond and rotating triangle geometries that show tunable folding and unfolding by thermal fluctuations and actuation by magnetic attractions.

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But in the worst-case scenario, the Deorbit Vehicle won’t be ready. Without it, a protocol agreed on in 2024, which relies on the Russian Progress spacecraft, could come into play. There will be vexing trade-offs to consider. Allowing the ISS to descend toward Earth on its own saves gas, which the ISS will need when it’s finally time to eject into the atmosphere and ensure a burial at sea. But a slow descent jeopardizes the machinery needed to maintain remote control.

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But handling that stuff is slow. To calculate a string’s width it can’t call len on the string. Instead it has to pass every character through a state machine.

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