Stem-cell researcher Carolina Florian didn’t trust what she was seeing. Her elderly laboratory mice were starting to look younger. They were more sprightly and their coats were sleeker. Yet all she ...

Imagine a high-tech security system, constantly scanning for intruders, identifying threats, calling for backup, neutralizing them, cleaning up the mess, and keeping detailed records for next time.

The human immune system is one of the body’s most complex and fascinating defence mechanisms. It works tirelessly to protect us from infections, bacteria, viruses, and other harmful invaders. While ...