Genetic genealogy is cracking cases once thought unsolvable. Not all police forces can afford to use it
New technology is allowing detectives to take DNA evidence from old cases and search for family ties online. But testing that DNA, devoting officers to the case and hiring genealogists to look for clues costs money and not all police forces have the funding.
Spider webs catch more than prey. They’re also jam-packed with animal DNA
Spider webs, it turns out, trap more than unwitting bugs. The sticky surfaces also contain a bounty of genetic materials from dozens of animal species — making them a powerful tool for measuring biodiversity.
