In a study, it wasn't the bravest mice, but rather the shy ones, that proved to be the most persistent tinkerers.

Shy mice, it turns out, have a higher chance of succeeding than their bold counterparts. A team from the Max Planck Institute ...

Led by Alexandros Vezyrakis, with Anja Guenther and Valeria Mazza, the team tested over 100 mice both in semi-natural enclosures (mimicking their wild habitats) and later in controlled lab arenas.