Neiman’s team dated the snail’s genome duplication to less than a million years ago — incredibly recent in evolutionary terms, but long enough ago for the species to have begun the longer process of adjusting to its heavier genomic load.
—
Carrie Arnold
Contributing,
Quanta Magazine,
2 Sep. 2026
The deeper history comes from dead coral heads, which can be dated using uranium-thorium methods to within a few years, even as far back as 500 years.
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