Certainly, these genes are involved in life extension in simple species such as threadworms and yeast.

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Our brains are much better at processing the simple risks we've had to deal with throughout most of our species' existence, and much poorer at evaluating the complex risks modern society forces us to face.

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"Building this was not as simple as it should be, because there has not been any formal way to register species, " Costello says.

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