Los Angeles County will retest about 4,000 DNA samples connected to criminal cases after discovering that it had been using potentially defective test kits to collect evidence for the past several months, Sheriff Robert Luna said in a statement this week. The kits were “prone to intermittently poor performance,” the sheriff said on Wednesday, and … Read more
Track and field will introduce mandatory DNA sex testing for athletes entering female competitions, its global leader said Tuesday, making it the first Olympic sport to add the requirement. The move comes amid an increasingly vexed debate over eligibility rules in female sports and comes less than a year after the issue erupted at the … Read more
For decades, the native iguanas of Fiji and Tonga have presented an evolutionary mystery. Every other living iguana species dwells in the Americas, from the Southwestern United States to the Caribbean and parts of South America. So how could a handful of reptilian transplants have ended up on two islands in the South Pacific, over … Read more