Ant Navigation

It's amazing that something with a brain the size of a pin head is able to navigate using the sun and memories.
A study has looked at how ants use the sun and memories to navigate back to their nests even whilst walking backwards and dragging their food.
http://www.bbc.co.uk/news/science-environment-38665058
Original study:
http://www.cell.com/current-biology/abstract/S0960-9822(16)31466-X