year in review 2018 Paperturn - Page 144



A NEW TIMELINE
FOR HUMAN
EVOLUTION
New research from an international team of scientists led by
Dr Robyn Pickering, an isotope geochemist at UCT, is the first to
provide a timeline for fossils found in the Cradle of Humankind –
the world’s richest site for fossils of our human ancestors.
caves and a model to explain the
age of all the fossils from the entire
region,” said Pickering.
Using uranium-lead dating, the
research team analysed 28 layers of
flowstone, a type of rock that forms
when water drips into a cave. The
The research, published in the journal
Nature, addresses assumptions that
the fossil-rich caves of the Cradle
could not be related to one another
chronologically.
“Unlike previous dating work ... we
are providing direct ages for eight
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