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Cage for reviving canary, with oxygen cylinder, made by Siebe Gorman & Co. Ltd, London.

These days the phrase "canary in the coal mine" is used to refer to any early warning sign of trouble or danger, but it's based in the real history of canaries being used in coal mining. Miners would carry the songbirds into the mine with them as a makeshift carbon monoxide alarm, as the bird's small body would be impacted by the odorless gas first, giving miners time to evacuate before it built to deadly levels.

Many if not most of us probably assume the canaries used for this purpose gave up their lives to save the coal miners. As it turns out, that was not always the case.

In fact, the man who created the canary in the coal mine system went out of his way to make sure the birds could do their job safely.

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Science

Scientists have finally figured out how whales are able to 'sing' underwater

The physical mechanism they use has been a mystery until now.

Baleen whales include blue, humpback, gray, fin, sei, minke whales and more.

We've long known that baleen whales sing underwater and that males sing in tropical waters to attract females for mating. What we haven't known is how they're able to do it.

When humans make sound underwater, we expel air over through our vocal chords and the air we release rises to the surface as bubbles. But baleen whales don't have vocal chords, and they don't create bubbles when they vocalize. Toothed whales, such as sperm whales, beaked whales, dolphins and porpoises, have an organ in their nasal passages that allows them to vocalize, but baleen whales such as humpback, gray and blue whales don't.

Whales are notoriously difficult to study because of their size and the environment they require, which is why the mechanism behind whale song has remained a mystery for so long. It's not like scientists can just pluck a whale out of the ocean and stick it in an x-ray machine while it's singing to see what's happening inside its body to create the sound. Scientists had theories, but no one really knew how baleen whales sing.

Now, thanks to researchers at the University of Denmark, that mystery has been solved.

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Image from Pixabay.

Under the sea...

True
The Wilderness Society


You're probably familiar with the literary classic "Moby-Dick."

But in case you're not, here's the gist: Moby Dick is the name of a huge albino sperm whale.

(Get your mind outta the gutter.)

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Joy

Cat who refuses to eat wet food without a side salad has people 'warning' owner

"Next thing you know he’ll be demanding oat milk in his latte."

Shaggy has to have his greens with his meal.

Cats have a reputation for being fickle little weirdos, and for good reason. Perhaps your Persian wakes you up every morning by affectionately chewing on your hair. Maybe your tabby has a pet almond that he carries around like a security blanket. Maybe your Maine Coon likes to sleep with his face buried in your shoe.

Since finickiness is an innate feline trait, it shouldn't surprise us to hear about a kitty's particular peculiarity, but it often does. because just when we think we've heard all of the strange things that cats do, someone shares a new one that makes us laugh, scratch our heads and say, "Huh?!"

For instance, meet Shaggy, the cat who won't eat his wet food unless it's accompanied by a side salad.

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