In an evolving branch of forensic science, genealogists help solve crimes, sometimes identifying suspects with the DNA of distant relatives they’ve never met. As cold cases yield, concerns about privacy issues persist.
Ultrasound isn’t just for images. Sonogenetics and other promising technologies let researchers use focused sound waves to control genes and entire cells deep in the tissues of living animals, without surgery.
They worm into snails and infect the brains of fish. They’ve also found their way into Kevin Lafferty’s heart. He sees them as beautiful examples of sophisticated evolution, and as keys to ecosystem balance.