Looking Down A Well: A Brief History of Geodesy

Submitted by: kitteh9lives 5 years ago in Science

Eratosthenes discovered that you could measure the circumference of the Earth by looking down a well and created Geodesy
There are 14 comments:
Male 3,431
Damnit Davy, I bet your a hit a parties!

I agree with your sentiment though, not only is it fascinating to learn, but understanding the processes by which we acquired this knowledge is equally amazing.
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Male 40,728
[email protected] Something that wasn`t invented first by ancient Greeks!
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Male 15,257
"OK, I`mma shut up now before I attract a bully."

BOF! Smoothie!
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Male 12,138
I love this sh*t, I have a passion for geodetics (sad, I know).

Say, here`s a head-melter. In the video buddy describes Everest as the "tallest mountain in the world". See, that`s where it get`s funky.

Everest is better described as the "highest mountain in the world", being the highest point on our planet above sea level. The "tallest mountain in the world" is probably Mauna Kea in Hawaii, being much larger from base to apex. Sure, most of it is underwater, but why is sea level the measure? F*ck, if you want to get really funky, and pick your base-point datum of measurement of height as the centre of the earth (and why not? It`s just as arbitrary as the rest of the datums), then the beaches around the equator are higher than Everest due to the earth being an oblate spheroid because of planetary rotation.

OK, I`mma shut up now before I attract a bully.
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Male 1,920
Guess I didn`t pay attention, but this video is from NASA, so I guess that would make the narrator American.
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Male 1,920
"interesting accent...where`s he from?"

Sounds like a US accent to me, but where exactly I can`t say. He almost sounds like possibly southern the way he says certain words, but there`s something about his voice that also seems like it may have been digitally processed, maybe to make it deeper. It has kind of an auto-tuney sound to it.
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Male 571
[quote]First, no - you are the only one that read `Goatse.` Stop it already.[/quote]

Oh, that`s right, You speak for everybody. How could I have forgotten.
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Male 25,416
I dont need to learn this early
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Male 629
First, no - you are the only one that read `Goatse.` Stop it already.

Second, neat.

Third, this doesn`t help that I am still always lost (but also never lost). I have almost no awareness of how places are connected together. I have a small house and I can`t accurately sketch out the floor plan. I am always facing North, whichever way I am facing. I memorize landmarks to know which way to turn, but I can`t `tell` where anything is in relation to anything else.

Does anyone else have this issue? I am never homesick, because I am always right where I am (which is where I have always been) and everywhere else is simply everywhere else. So - I`m never really lost, everyone else is.
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Male 4,998
I think kids would learn more if they were given three minute videos like this.
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Male 571
Did anyone else read this as "A Brief History of Goatse?"
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2,831
all that and they still cant figure out how magnets work
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Male 214

interesting accent...where`s he from?
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Female 8,043
Link: Looking Down A Well: A Brief History of Geodesy [Rate Link] - Eratosthenes discovered that you could measure the circumference of the Earth by looking down a well and created Geodesy
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