OK.
It still claims that the Homo Sapien “Adam” could be 174,000 - 321,000 years old.
It still claims that previous studies estimate "Adam" to be 500,000 years old.
No mention of the African fossil record for Homo Sapiens, which, as far as I know, goes back just 200,000 years.
“It still claims that the Homo Sapien “Adam” could be 174,000 - 321,000 years old.”
No. Those are the boundaries on the accuracy of their measurements. They are happy that the dated age of ‘eve’ is in the range.
The study, published in Nature Genetics, put the new age for genetic Adam at between 174,000 and 321,000 years ago. Genetic Eve is thought to have walked the Earth around 200,000 years ago: well within the new error margin for Adam.
“It gives us enormous confidence to have a timeline that is similar,” said Stefánsson.
“It still claims that previous studies estimate “Adam” to be 500,000 years old.”
Actually, it states that previous dates ranged from 50,000 to 500,000 years ago. But so what. It has nothing to do with their study.
Previous dates for ancestral Adam ranged from far more recent, just 50,000 years ago, right back to around 500,000 years ago, with some estimates showing major mismatches with the dating of ancestral Eve.