Stuff you didn't know and probably don't care about

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KMFJD

Lifer
Aug 11, 2005
29,685
43,947
136
Actually i think a lot of people would find this one interesting.......Grocery store pricing shenanigans

 

Charmonium

Diamond Member
May 15, 2015
9,583
2,947
136

This is such a cool article. For 2000 years we've tried to recreate the durability and strength of Roman concrete. And the answer is so completely ingenious - hint, drippy calcite.

“In every sample we have seen of ancient Roman concrete, you can find these white inclusions,” bits of rock embedded in the walls. For many years, Masic says, the origin of those inclusions was unclear — researchers suspected incomplete mixing of the cement, perhaps. But these are the highly organized Romans we’re talking about. How likely is it that “every operator [was] not mixing properly and every single [building] has a flaw?”

oops - calcium oxide. It's been 50 years since HS Chem so cut me some fucking slack, k?
 

Charmonium

Diamond Member
May 15, 2015
9,583
2,947
136
How now brown cow, how do kitties purr?


They apparently have thicker "pads" in the larynx (the plural is apparently larynges) that seem to reduce the rate of vibration to around 25-30 hertz. There IS however still some disagreement on the matter.
 

Charmonium

Diamond Member
May 15, 2015
9,583
2,947
136
Weird. I just assumed they had a tiny electric motor in their throats.
I suppose I should have explained why this is so interesting.

It's a pretty rigid rule that the sound an animal can produce tends to vary with size. So bigger animals can produce lower sounds.

Cats are an exception to that rule since they purr at frequency that is much lower than their body size would suggest - about 25-30 hertz - which, perhaps incidentally, is just at the lower boundary of human hearing.

edit: We've kept cats around as mousers and pets for at least 10k years but since I believe most felines purr, the adaptation probably wasn't for our benefit. When me and the ex got second cat for the calico/maine c00n mix and brought it home, she pretty much roared like a lion. So making that deep, very low frequency sound is probably a useful evolutionary adaptation making them sound very much bigger than they are.
 
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JEDI

Lifer
Sep 25, 2001
30,160
3,302
126
edit: We've kept cats around as mousers and pets for at least 10k years but since I believe most felines purr, the adaptation probably wasn't for our benefit. When me and the ex got second cat for the calico/maine c00n mix and brought it home, she pretty much roared like a lion. So making that deep, very low frequency sound is probably a useful evolutionary adaptation making them sound very much bigger than they are.
So Osiris, God of cats, that's your secret to longevity :lol:
 

Charmonium

Diamond Member
May 15, 2015
9,583
2,947
136
Deep craters are very . . . "artistic" but if you're looking to kill things like people, frags and crushing air pressure is what you really want.

In Vietnam, they called the 15000 pound BLU82s "daisy cutters." A little like calling 300lb liineman "little."

From what I've read and heard, hyperbaric bombs create so much pressure that they basically liquify your insides.
 

Ajay

Lifer
Jan 8, 2001
16,094
8,106
136
From what I've read and heard, hyperbaric bombs create so much pressure that they basically liquify your insides.
And if that's not enough, you get incinerated. And should you, by some miracle, still be alive - all the oxygen is gone from the air - so you suffocate. Luckily - Hitler didn't have these - he would have jumped for joy.
 
Reactions: Charmonium

JujuFish

Lifer
Feb 3, 2005
11,033
752
136
Lol paleo or go home. Humans didn't evolve with a sugar diet.

Wal mart lard asses did. 31M Americans are diagnosed diabetic. 20% are undiagnosed.

Die, fat people, die.
Eh, paleo is good in that it discourages processed foods, but it also encourages eating a lot of red meat.

But I agree that sugar is a major health concern. I guess we can thank the low-fat craze of the past for that.
 

highland145

Lifer
Oct 12, 2009
43,551
5,960
136
Eh, paleo is good in that it discourages processed foods, but it also encourages eating a lot of red meat.

But I agree that sugar is a major health concern. I guess we can thank the low-fat craze of the past for that.
Red meat isn't bad. Corporate red meat, farmed salmon, company pork is....

Sadly, most people have no access to grass fed meat and get corn fed, omega 6 meats.
 

lxskllr

No Lifer
Nov 30, 2004
57,663
7,894
126
That's a cool way to display density. Seems almost binary though. I find it hard to believe *no one* lives in the flat areas. I'd like to see a contour plot of population. Assign 0' to empty, then... I'd have to think about it a bit. Maybe have a maximum of 5000' for any population you'd expect to find anywhere, and prorate the population-elevation through the scale.
 
Reactions: KMFJD

JEDI

Lifer
Sep 25, 2001
30,160
3,302
126
K.E. = 1/2 mv^2

KE is kinetic energy, m= mass, v=speed

a fleck of paint in outer space going 15k miles per hr can punch holes through stationary satellites.
(almost anything x 15k miles per hr squared has ALOT of energy!)
 

sdifox

No Lifer
Sep 30, 2005
96,198
15,785
126
That's a cool way to display density. Seems almost binary though. I find it hard to believe *no one* lives in the flat areas. I'd like to see a contour plot of population. Assign 0' to empty, then... I'd have to think about it a bit. Maybe have a maximum of 5000' for any population you'd expect to find anywhere, and prorate the population-elevation through the scale.
That's where the goblins setup their forge.
 

Charmonium

Diamond Member
May 15, 2015
9,583
2,947
136
First labor strike in SPAAAAAAACCCCEEE


The crew gained the reputation of “complainers,” and their exchanges with Houston lost their civility. Finally, a couple of days after Christmas, Carr wired a manifesto earthward: “We need more time to rest. We need a schedule that is not so packed. We don’t want to exercise after a meal. We need to get things under control.”

Houston’s response was chilly: The crew had to meet its schedule. On Dec. 28, the crew staged its strike. (In some accounts, it’s called a “mutiny,” which is surely too harsh.) Carr turned off the radio link with the ground and crew members spent a full day relaxing, taking things at their own pace and pursuing projects of their own.

The ground crew, stuck at the far end of a dead radio hookup, had no choice but to fume impotently. When Skylab came back online, NASA was much more amenable to discussion. Houston agreed to afford the crew full rest and meal breaks, and replace its minute-by-minute schedules with a list of tasks to be completed, leaving it to the crew to manage its own time.
 

Charmonium

Diamond Member
May 15, 2015
9,583
2,947
136
And if that's not enough, you get incinerated. And should you, by some miracle, still be alive - all the oxygen is gone from the air - so you suffocate. Luckily - Hitler didn't have these - he would have jumped for joy.
Aside from maybe the Vikings or Huns (or the Spanish Inquisition), US military engineers are the last group you ever want to screw with.
 
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