sciencehabit writes: If the clock rewound, would organisms evolve the same way they did before? Humble stick insects may hold the answer to that long-running question in biology. Through studies of these bugs, whose bodies match the leaves the insects live on, researchers have found that although groups of the bug have evolved similar appearances, they achieved that mostly via different changes in their DNA. “I think it says that repeatability of evolution is very low,” says Andrew Hendry, an evolutionary biologist at McGill University in Montreal, Canada, who was not involved with the work.
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