In the future, you might not have to resort to exotic materials to create heart cells — you could just raid your grocery store’s produce section. Scientists have invented a process that turns spinach leaves into farms for functioning human heart cells. The team started by pumping a detergent solution through the spinach, stripping it of its plant cells and turning it into a ghostly shell made mostly of cellulose. After that, they cultured heart cells on the remaining structure, sending both fluids and microscopic beads through the vegetable’s now-empty veins in order to feed the new cells.
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