Octopus human behavior
The really exiting thing about this time is that an animal is considered so simple is now a very very different animal perhaps humans is really doing a complex behavior. In the past it may considered just the preserve of us and for the monkeys and I think it is amazing that this had lot and lot of foams are really doing complicated behaviors including using this form of tools.
This is an octopus running around collecting cups, sticking them, running along with keeping them underneath its body and then assembling them in perfect amber for protective comforts. So it is planned feature used and it comes as a cost carrying them. And it shows the fantastic examples of complex behaviors as in invertebrates.