Rat sperm cells have grown inside sterile mice, and the technique used could lead to human-rat hybrids for biomedical research or help save endangered species. Pluripotent stem cells (PSCs) can divide ...

A technique that is increasingly used worldwide to improve the welfare of rats in research is rat “tickling”—whereby humans make light, brisk, and vigorous movements with their fingertips on a rat’s ...

Although bones have the ability to regenerate and repair themselves, they are generally unable to do so when the injury is larger than a small break or chip. In a study just published in Inflammation ...