A NEW RECORD: Baby Born From 20-Year-Old Frozen Embryo. “That couple had anonymously donated their leftover embryos after the woman successfully gave birth. Thing was, they did so in 1990 – meaning that the boy just born to the woman in the study has a sibling out there somewhere who was conceived at the same time but is 20 years younger.”

UPDATE: Yeah, that should be older, not younger. The boy just born is the younger one, of course. But in defense of the PopSci editors, I had to read that twice myself.