US-based scientists analysed data from tiger sharks tagged with acoustic transmitters, and found that they took directed paths from place to place.

BBC: Sharks navigate using 'mental maps'

In most cases, it is better to have higher rather than lower engagement scores, but in order to take action directed towards improving organizational performance, the items need to be looked at separately and used to make data-based changes that will drive employee retention, performance, and commitment.

FORBES: An Idiot's Guide to Employee Engagement