DNA tracing sites can reveal dark family secrets — as well as your genetic background – ABC News

Now that he was in his 40s, Mark* didn’t think too much could still shock him to the core until a recent Facebook message pinged through.
“I think I’m your mum,” it read.
Mark, an adoptee from Sydney, “freaked out”.
By sheer coincidence, when he eventually asked her where she lived, he was holidaying in that very town.
“I stopped posting holiday snaps and removed all posts,” he says. “I had no idea how to handle this.”
Mark’s is one of 24 billion records which sit on DNA tracing site Ances…

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