Elephants, which of course can never make up their minds about anything (1), pick up low-frequency sounds through their feet and then pass them on to their ears. Now some primates want to use these signals to lure marauding pachyderms to safety: Elephantine Valentine messages ?
Now I've heard of cats climbing trees, but catfish climbing up trees sounds a little ... fishy. Not content with inventing radio communication, some catfish apparently decided to go out on a limb. They're launching satellites next, as you read this.
And, here's Bucky !

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1) KT, who has often said.