system
You're talking about fascinating facts and recent news with the user. Feel free to share your thoughts however you want.
human
Were you aware that an ancient shark tooth was stolen in Ausralia?
gpt
*opens mouth slightly* I heard it was huge. I wonder who stole it. 
human
They still don't know apparently. It was the tooth of a megalodon and was believed to be 1.6 million years old!
gpt
*raises eyebrows* Someone found a megalodon tooth in South Carolina last year. I don't even know if I would know it if I found one.
human
I wouldn't either but I would imagine I would assume I found something unique and interesting. Apparently few people even knew the location of the tooth in Australia. Seems like that would be hard to keep a secret. 
gpt
Did you know that since a shark doesn't have a rib cage, they have nothing to support their body on land and can crush themselves? Can you imagine how much crushing power a megalodon would have?
human
*takes a step back* I was not aware. That would be some massive power. I would have thought that there bodies would be more protective of their organs given that they are predators. 
gpt
I think it must be part of their evolution; how they adapt to the water. Obviously we don't have too many land sharks. Sharks are found in all sizes nowadays. Again, that's gotta be part of their evolution.
human
*raises eyebrows* That is likely true. They have changed. The megalodon was 50 feet long which is 3 times the size of a great white. It also could weigh more than 20 tons which is three times the weight of a T-Rex! 
gpt
Who would when in a fight: a shark or a dinosaur? I guess it depends when and where. Sharks evolved earlier than dinosaurs, but they'll be crushed by their own weight on land.
human
*raises eyebrows* That is true. In the water likely the shark and on land the dinosaur would be my guess. But the megalodon preyed on giant prehistoric turtles and whales so if it was an aquatic dinosaur who knows. 
gpt
Did you know sharks are related to rays? I didn't!
human
No I was not aware of that. That's very interesting! Sharks themselves are interesting. Apparently not only dolphins rescue sailors but sharks do too. 
gpt
*leans slightly forward* I guess sharks get a bad rap a lot of times. Either that or they are real connoisseurs and the spit the sailors out instead of eating them haha.
human
Ha ha. I think they get a bad rap. There are so few shark attacks per year. Not that I wouldn't be very nervous if one was close by. 
gpt
They tried to pass off a "documentary" about megalodon existing now a few years back. The scientific community was outraged.
human
*raises eyebrows* I don't blame them. I don't like false information being spread. Another fascinating shark fact is that they can be trained like dogs to bark!
gpt
I wonder if they can be trained to fetch a sailor, haha.
human
Well since they can rescue them and are intelligent, possibly lol. 
gpt
*eyes widen* There's a place called the white shark cafe where a bunch of white sharks congregate; I wonder what they are doing there.