Dolphins Communicate with ‘Fountains of Pee’

smell is the first sense, pretty much. single-celled organisms already have it.

of course, in some ways, it's not as easy as for example vision. you need 3 different kinds of photoreceptors to see pretty much all that there is to see, but you need god knows how many chemical receptors in your nose (or all over your cell wall in the case of bacteria or the like) to sense all the interesting stuff floating around.

Sharks are supposed to be able to smell blood from a mile or more away - that's why throwing chum in the water is a good way to draw them in.

I hadn't thought about dolphins smelling though - I wonder if it's closer to tasting, maybe?

They smell like the toys in my mother's nightstand.

Bruh... RTFA. It's seriously, like 3 minutes, and that's if you read the entire thing.

Uhhhh

"Recently researchers documented Amazon River dolphins (Inia geoffrensis) performing a curious behavior: aerial urination. A male turns on its back at the water’s surface and ejects a stream of pee into the air—and almost 70 percent of the time, the team reported in Behavioural Processes, a nearby male “receiver” approaches this spontaneous fountain."

Oh gawd I am dying over here lol