The agency replied two months later, saying it had “competing priorities,” officials from a coalition of Western states said.

Scientists in Mexico were the first to perform ultrasounds on giant manta rays to detect pregnancies. The researchers hoped to learn more about the life cycle of the largest ray species in the world.

Her decades of work on Huntington’s disease helped lead to the creation of a genetic test for the devastating condition. Why didn’t she take it herself?

As predictive medicine advances, legal scholars warn that decades-old federal guidelines could set up a potential clash between your genes and your job.