PICK OF THE WEEK : Dolphins ‘cleverer than we think’

Dolphins have a reputation for being intelligent creatures, but researchers have discovered they are even cleverer than we think. It turns out that mother dolphins have been teaching their daughters how to use marine sponges to look for food. The amazing thing is that the behaviour has been found mostly in one family of dolphins — meaning that the skill was started and developed by them. Some animals, for example chimpanzees, have been seen teaching their babies to use sticks and stones as tools. The dolphin discovery is interesting because it only affects females. Scientists made it after studying a group of bottlenose dolphins, 13 of which used sponges and 172 which did not. — Agencies