Researchers have uncovered unexpected diversity in the genetic processes that determine the sex of the African clawed frog, a significant discovery in what was already one of the most widely studied ...

BOSTON (AP) — A Harvard University researcher accused of smuggling clawed frog embryos into the United States was indicted Wednesday on additional charges. Kseniia Petrova, a Russian-born scientist ...

BOSTON — A Harvard University researcher accused of smuggling clawed frog embryos into the United States was indicted Wednesday on additional charges. Kseniia Petrova, a Russian-born scientist ...

FILE - This undated photo provided by Polina Pugacheva in April 2025 shows Kseniia Petrova, a Russian-born scientist who was a researcher at Harvard University. (Polina Pugacheva via AP, File) (Polina ...