Pivoting colloidal assemblies exhibit mechanical metamaterial behaviour

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The incident also comes almost 30 years to the day since Cuban defence forces shot down two small civilian planes belonging to Brothers to the Rescue, a US-based group that searched for rafts carrying migrants from Cuba to the US.

Several properties of agar render it a superior jelly. Agar isn’t broken down by microbial enzymes apart from a few species (including bacteria living in marine and freshwater habitats), and it dissolves well in boiling water, making it easy to sterilize. The jelly doesn’t react with the ingredients of a broth, whose composition can be adjusted to meet the nutritional requirements of different microbes, and sets to a firm gel without the need for refrigeration.

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