This new study of wild sharks navigating off the coast of California supports the olfactory spatial hypothesis and was published this week in PLoS ONE.

Nosal et al 2016 PLoS ONE

See the write-up and interview with Lucia Jacobs in this column on animal behavior in WIRED:

http://thewire.in/2016/01/11/how-do-sharks-navigate-across-the-open-sea-19065/