Joseph James DeAngelo Jr, a former policeman and navy veteran, admits to being the notorious killer and rapist who stalked the state during the 1970s and 1980s.
The bodies of 39 people were found in a truck container in Grays, about 32 kilometres (20 miles) east of central London. British police are still trying to establish the identity of victims who in many cases lacked identity documents.
Collecting and storing the DNA of people simply detained and not tried or convicted of a crime could draw criticism from civil rights groups.
Researchers at Hacettepe University in Turkey's capital Ankara hope that their testing and analysis of 12,000 human skeletons will give them insights into human life going as far back as 10,400 BC.
The world's first baby has been born using a new "three-parent" fertility technique in Mexico. The baby boy has the usual DNA from his parents and a bit of genetic code from a female donor.
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