Up-to-date population estimates are difficult to determine because of environmental restraints preventing access to sites where the frogs are thought to live. The goal of the recent efforts has been ...

Growing tissues can crack, break, and dissociate to form structures that can later withstand immense forces.

For decades, scientists believed a fertilized egg’s DNA began as a shapeless mass, only organizing itself once the embryo switched on its genes. But new research reveals that the genome is already ...