The lecturer talks about strange sounds that Russian submarine crews called quackers. She contradicts each theory of the reading, saying that they have certain problems.
First, the theory that suggests that the strange noises were calls of ocra whales during a courtship ritual. The lecturer refutes this point by saying that this theory is highly unlikely, because the ocra whales lived near the surface of the ocean and the submarines cannot be able to detect in the deep ocean. So, what is state on the reading, that the sounds ocra whales make are like those that the submarines were detecting, may be false.
Second, the theory about that the sounds were caused by giant squid. According to the lecturer, the sounds starting in the 1060s and disappeared
First, the theory that suggests that the strange noises were calls of ocra whales during a courtship ritual. The lecturer refutes this point by saying that this theory is highly unlikely, because the ocra whales lived near the surface of the ocean and the submarines cannot be able to detect in the deep ocean. So, what is state on the reading, that the sounds ocra whales make are like those that the submarines were detecting, may be false.
Second, the theory about that the sounds were caused by giant squid. According to the lecturer, the sounds starting in the 1060s and disappeared