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A sperm count just half that of forty years ago if that trend were to continue by twenty fifty they'd be sterile. a range of culprits are being blamed for moans and water supplies to chemicals in plastic all can disrupt the body's hormones but is help at hand from the lab. researchers in china the u.s. and britain have created artificial sperm in mice at least. the technique involves converting embryonic stem cells to emit sure sperm cells. the mice produced using lab grown sperm were later able to produce offspring of their own. but they had a shorter life span than ordinary mice and were als...

An unrefrigerated vault for 20 years. time, heat, bacteria, any one of them might have destroyed the dna and with it lowery's hopes for clearing his name. the innocence project makes the decision to send the rape evidence to a lab outside of san francisco. dr. edward blake is known for his skill in teasing dna from even the oldest and smallest samples. >> is the relevant biology there so that something useful can be done with it? that's the thing i don't know when the evidence arrives. >> dr. blake first examines the evidence, including bed sheets and swabs taken from the victim back in 1981. ...

>> scheck and clark tell lowery not to celebrate yet. the evidence has been sitting in an unrefrigerated vault for 20 years. time, heat, bacteria, any one of them might have destroyed the dna and with it lowery's hopes for clearing his name. the innocence project makes the decision to send the rape evidence to a lab outside of san francisco. dr. edward blake is known for his skill in teasing dna from even the oldest and smallest samples. >> is the relevant biology there so that something useful can be done with it? that's the thing i don't know when the evidence arrives. >> dr. blake first exa...

>> is the relevant biology there so that something useful can be done with it? that's the thing i don't know when the evidence arrives. >> dr. blake first examines the evidence, including bed sheets and swabs taken from the victim back in 1981. he finds that sperm cells are still present. blake extracts dna, amplifies it into a full profile, and compares it to eddie lowery's dna. >> and the result of that analysis eliminated him as a sperm source. no possibility whatsoever. >> after 20 years, eddie lowery has been vindicated. >> we wanted a finding from this court not just that eddie was not g...

Republican. it was his turncoat colleague shelby in alabama. now, on another top take really does is going to cause a lot of controversy. there is a clinic in washington state that advertised in british vancouver, in canada for couples who wanted to have a selection of boys or girls. who would be done by in vitro fertilization. my brother and his wife did the same thing. but in this case, they go through the dna of the mother or the father and they go through dna of sperm cells that are being held for in vitro and they figure out which one is going to be a boy or a girlment and then they do br...