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Rawstory: The behavior was captured by filmmakers during the creation of the BBC One documentary series Dolphins: Spy in the Pod, which used spy cameras hidden in fake turtles, fish and squid to film more than 900 hours of the aquatic mammals in their natural habitat.
Puffer fish release a toxin that can be deadly in larger amounts, but it can produce a narcotic effect in smaller doses.
Scientists found that dolphins apparently had learned just how much of the toxin would safely intoxicate them, and they carefully chewed the fish and then passed it among themselves.
The dolphins then entered what appeared to be a trancelike state.
“This was a case of young dolphins purposely experimenting with something we know to be intoxicating,” said Rob Pilley, a zoologist who worked as a producer for the series. “After chewing the puffer gently and passing it round, they began acting most peculiarly, hanging around with their noses at the surface as if fascinated by their own reflection.”
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BusinessInsider: "The secret is supercooling the water first. To supercool something, it has to reach a temperature below its freezing point while staying in a liquid form. Normally when water drops below 32 degrees Fahrenheit, it freezes and turns into ice.
But if the water is pure enough and there aren't any imperfections in the container holding it, the water will get stuck in its liquid state. That's because ice crystals need what's called a nucleation point in order to form. This nucleation point can be any kind of impurity in the water, like a speck of dust. Then, the ice crystal is the starter for more ice crystals — expanding the crystals exponentially.
This supercooled liquid state is not very stable either. All it takes is a jolt to align water molecules in a way that make the ice crystals start forming. They fill the entire bottle in seconds:"
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