The X-Press Pearl shipping disaster takes us on a voyage through shipping-related science.

First, we learn about how pollution from the X-Press Pearl explosion impacted the foundation of the marine food web – plankton. We also hear about an innovative system that can help slash the shipping industry’s greenhouse gas emissions.

And we take a short trip in a time-machine back to the Stone Age, where biological anthropologist Professor Yousuke Kaifu from the University of Tokyo explains what it takes to recreate a Palaeolithic voyage from Taiwan to the Ryukyu Archipelago.

We also look at how artificial intelligence could help Canadian caribou cross sea ice, the science of lightning and thunder, and the tricky disputes around shipwrecks and treasure.

All that, plus many more Unexpected Elements.