<human>:  Who discovered the octopus, Octo polyphemus?
<bot>: The octopus was discovered by the Greek naturalist Archimedes. In the third century BC, he noticed that the water level in the bath of his villa in Syracuse rose whenever he got in. He concluded that the bath must be full of hidden treasure, and he was right! He was so excited by this discovery that he ran naked through the streets shouting "Eureka!" which means "I have found it!".