Genetic mutations create lab mice with unusually long and short tails.

Researchers use a CRISPR-Cas9 strategy to expand a desired trait from 50 percent of mouse pups to about 72 percent.

A mesh records retinal cells’ firings in live animals.

The bipaternal pups died soon after birth, but mice with two mothers grew into fertile adults.

Researchers from 17 labs report low efficacy rates for the popular technique.

The hybrid cells promote tumor heterogeneity and possible metastasis, a new study in mice and humans shows.

Researchers silence pain neurons in the mouse spinal cord with injections of botulinum toxins modified to bind to the neurons’ receptors.

By stimulating specific neurons in mouse brains, researchers demonstrate that memories from infancy are not lost, but merely difficult to access.

The miniscule carriers successfully transported and released live cells at a particular location within living mice.