Recent comments in /f/todayilearned

MikiLove OP t1_j6ineoh wrote

Controversial I realize, but the guy did openly support letting the Confederacy secede and later conspired to overthrow the governments in the Midwestern states. Suppressing open treason I think it reasonable, especially during the Civil War

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dishonourableaccount t1_j6inc8w wrote

If people actually gave a fuck, they'd come up with some new calendar like the French Republican Calendar or in the Year of Our Ford. Instead people lazily renamed it in fear of people getting triggered.

Also, isn't it even more religious to imply the "Common Era" started with the start of the Christian calendar. Didn't think of that, huh?

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SamtheCossack t1_j6imhpy wrote

The 230 dB vocalizations are not for communication, they are for locating prey in the deep ocean. They are directed down, and used to locate the optimal location for the whales next dive. Communication clicks are considerably less energetic (Though still powerful).

I am not saying decibels aren't the right measurement, I am saying comparing the two on a 1 to 1 basis doesn't paint a useful picture of what is happening.

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cranial_prolapse420 t1_j6im054 wrote

It's a unit of measurement used to express the ratio of one quantity to another. The medium has nothing to do with it.

To convert between dB in water and air, just subtract 26dB from the measured water SPL. This is necessary because sound measured in air uses a reference level of 20upa @ 1m, water has a reference level of 1upa @ 1m.

I'd also argue whale vocalizations are likely omnidirection, since it's a method of communication and would be pretty ineffective if you had to aim it across an ocean and hope someone happened to be on the receiving end.

Still wondering which unit you'd prefer to use?

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NoBSforGma t1_j6il911 wrote

This is definitely worth a read.

https://en.wikipedia.org/wiki/Clement_Vallandigham

It's more about free speech and what rights people have during war time than "he shot himself in the courtroom." It's very interesting to read the back and forth about whether a President has the right to revoke free speech during a time of war.

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EchoVast t1_j6ik7ng wrote

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Ma3vis t1_j6iiwhd wrote

The process by which native americans endowed each other with new names, with the idea being that you were given a new name which informs a story relevant to the reason the name that was given is particularly interesting.

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