Oddities, curiousities and strangness in history [2]

by all accounts there are unique mosquitos to the London Tube. they have evolved.

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

Not surprised. The rats in the new york subways are the size of house cats. Can't tell me they haven't speciated.

Bridges blow me away, the sheer size & scale is powerful. I cant imagine how they were ever completed. I just find them amazing.......

Is that the same bridge 3 times, or just the same design?

I think 2 bridges are the same but, its soooooo wow !

Love bridges, and those are some fantastic pictures. A couple of them look similar to the Chesapeake Bay Bridge-Tunnel, which is not that far from where I am and that I'd love to drive across, though I haven't yet as I've never had a reason to go to Hampton Roads.

My gawd Eldo ! That bridge makes me shudder, its like an adrenalin boost, You hate it & love it at the same time...like Marmite

I know about the Bay Bridge, but where's the bridge/tunnel?  Never heard of it before.


Edit: oh, looked it up. Norfolk. No, there's no reason to go there. That's where sailors go to get bored silly.

azriel wrote:I think 2 bridges are the same  but, its soooooo wow !

I can't believe that berm is high enough to keep it from flooding if a wind storm whips up the waves.

halfwise wrote:I know about the Bay Bridge, but where's the bridge/tunnel?  Never heard of it before.


Edit: oh, looked it up.  Norfolk.   No, there's no reason to go there.  That's where sailors go to get bored silly.

Well yeah, like I said, I've never had a reason to go to the Norfolk/Hampton Roads area.

The Bay Bridge itself is pretty cool too, don't get me wrong, but I've never been across a bridge-tunnel before.

Halfy..."
I can't believe that berm is high enough to keep it from flooding if a wind storm whips up the waves"......

Now I really am shitting a brick !

Basilica cistern, Istanbul. Used to store water, is now a tourist attraction.



Catacombs underneath Paris, contain 6million deceased people.



Kasukabe, Saitama, Japan. Holds flood water even today, yet you can have a look round if you like !



Mammoth Cave, National Park, Kentucky. Said to be the most extensive cave system in the world



(rather an unfortunate name but, hey ho ) Turda Salt mines, now with an underground lake, mini golf course, ferris wheel & museum, All under ground.

Volcán de Colima Eruption

chris63 wrote:

I imagine that to play a little tune, like a musical box, its addictive to look at !

chris63 wrote:

Wow !! thats a bit gobsmackie What is the magnification on that ? Just how do they make hypodermic syringes ??

Riddle me this?
If molten iron is amorphous (no crystal structure) and magnetic domains cannot align to give ferromagnetic behavior... Then how does Earths molten nickle-Iron core create a magnetic field?? hmmm?
No Dynamo affect could be achieved..

Aliens.....

{{{A giant hamster on a wheel right at the centre }}}

yes !!

The magnetic field is not caused by alignment of magnetic domains, it's caused by circulating electric current in the liquid core. Usually such a current needs a changing magnetic field to sustain itself, but the rotation of the earth helps keep the current going even when the magnetic field is roughly constant.

If you spin most things, you don't get a magnetic field because positive and negative charges are doing the same thing and cancel out. But if you had a current induced by a magnetic field from the surrounding space (solar magnetic field) then the rotation can keep it going.

It's not an obvious theory by any means, and in fact a model that seems to produce something that looks like the earth's field was only published in 1995.

I knew that

Seriously, I always assume you will be able to answer all the scientific posts, You & Dave, he's not backward at coming forward