With no training, bumblebees can work out how to use a ball like a ladder to feed on sugar from an out-of-reach flower.

Researchers at the University of Oulu demonstrate spontaneous problem-solving in bumblebees, a first for invertebrates.

Test your logic and problem solving skills with these two tricky puzzles. Only a small percentage of people can solve them quickly without getting stuck. Challenge yourself and see if you are part of ...