A study has found that, contrary to a previous controversial proposal, tardigrades have not acquired a significant proportion of their DNA from other organisms. Instead, new analysis shows that nearly all of what was proposed to be foreign DNA was simply bacterial contamination.

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A study has found that, contrary to a previous controversial proposal, tardigrades have not acquired a significant proportion of their DNA from other organisms. Instead, new analysis shows that nearly all of what was proposed to be foreign DNA was simply bacterial contamination.