Squid

 

 

 

 

 

 

Sperm whales are believed to do battle with colossal squid, though such a fight has not been observed
Sperm whales are believed to do battle with colossal squid, though such a fight has not been observed

Giant squid eyes are sperm whale defence

By Richard Black (Environment correspondent, BBC News)

 

The world's biggest squid species have developed huge eyes to give early warning of approaching sperm whales.


Colossal and giant squid both have eyes that can measure 27cm (11in) across - much bigger than any fish.

 

Scientists found that huge eyes offer no advantages in the murky ocean depths other than making it easier to spot enormous shapes - such as sperm whales.

 

Writing in Current Biology journal, they say this could explain the equally huge eyes of fossil ichthyosaurs.

 

Lead scientist Dan Nilsson from Lund University in Sweden was present at the unique dissection of a colossal squid performed four years ago in New Zealand.

 

There, he examined and handled the eyes - in particular, the hard parts of the lens.

 

These alone are bigger than an entire human eye.

 

"We were puzzled initially, because there were no other eyes in the same size range," Prof Nilsson told BBC News.

 

"You can find everything up to the size of an orange, which are in large swordfish.

 

"So you find every small size, then there's a huge gap, then there are these two species where the eye is three times as big - even though squid are not the largest animals."

In general, other squid species also have eyes that are smaller in proportion to their body size.

 

Sense of proportion

 

The streamlined giant squid (various species of Architeuthis) and the much chunkier colossal squid (Mesonychoteuthis hamiltoni) can both grow to more than 10m long, as measured from the tip of the body to the end of their tentacles.

 

The colossal squid especially is equipped with a fearsome arsenal of weapons, including barbed swivelling hooks.

 

Scars on the bodies of sperm whales indicate that they regularly do battle with the colossal squid, at least in the Southern Hemisphere waters where it lives.

 

And the number of colossal squid beaks found in the stomachs of sperm whales indicate that the latter often win.

 

Though colossal squid are encountered remarkably rarely by people, they are thought to make up about three-quarters of sperm whales' diet in the Southern Ocean.

 

Whereas the whales can spot squid using sonar, the squid can deploy nothing except vision - which suggests there would be a powerful evolutionary pressure towards developing effective eyes.

 

But structures this big and complex are "expensive" in terms of nutrients, meaning that for most animals the evolutionary pressure is against evolving them.

Dan Nilsson saw the colossal squid's eyes and their hard lenses during the dissection in New Zealand
Dan Nilsson saw the colossal squid's eyes and their hard lenses during the dissection in New Zealand

Prof Nilsson's team used mathematical models of how different sizes of eye perform at depths up to 1km.

 

There, moving objects are most detectable through the bioluminescence they provoke from countless tiny creatures in the water.

 

The models showed that in general, there is no benefit to be gained from developing eyes bigger than the swordfish's.

 

The exception is a really large moving object.

 

Here, large eyes enable better detection of a pattern of point sources of bioluminescence - light given off by tiny organisms - in low-contrast conditions.

 

This would give the squid warning of a sperm whale approaching at a distance of about 120m, the researchers calculate - potentially allowing it to take evasive action and avoid being eaten.

"It's the predation by large, toothed whales that has driven the evolution of gigantism in the eyes of these squid," commented Soenke Johnsen, a biologist at Duke University in Durham, US, who was also part of the research team.

 

They speculate that eyes of the same size might have enabled ichthyosaurs, large marine reptiles that died out about 90m years ago, to avoid the fearsome jaws of the even larger pliosaurs.

 

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Fri

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2015

Are Languages Products of their Environment?


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DISCOVER MAGAZINE published this very interesting article: 


  Languages Are Products of Their Environments


The characteristics that make each language unique may actually be adaptations to the acoustics of different environments.

2 Comments

Tue

03

Jun

2014

The Case for Reparations

 

The Case for Reparations

 

Two hundred fifty years of slavery. Ninety years of Jim Crow. Sixty years of separate but equal. Thirty-five years of racist housing policy. Until we reckon with our compounding moral debts, America will never be whole.

 

By Ta-Nehisi Coates

May 21, 2014

 


Chapters

  1. I. “So That’s Just One Of My Losses”
  2. II.  “A Difference of Kind, Not Degree”
  3. III. “We Inherit Our Ample Patrimony”
  4. IV. “The Ills That Slavery Frees Us From”
  5. V. The Quiet Plunder
  6. VI. Making The Second Ghetto
  7. VII. “A Lot Of People Fell By The Way”
  8. VIII. “Negro Poverty is not White Poverty”
  9. IX. Toward A New Country
  10. X. “There Will Be No ‘Reparations’ From Germany”
0 Comments

Mon

02

Jun

2014

A Look At 19th Century Children In The USA

PHILADELPHIA — DINNER with your children in 19th-century America often required some self-control. Berry stains in your daughter’s hair? Good for her. Raccoon bites running up your boy’s arms? Bet he had an interesting day.

 

As this year’s summer vacation begins, many parents contemplate how to rein in their kids. But there was a time when Americans pushed in the opposite direction, preserved in Mark Twain’s cat-swinging scamps. Parents back then encouraged kids to get some wildness out of their system, to express the republic’s revolutionary values.

The New York Times

Sunday Review

By JON GRINSPAN MAY 31, 2014

 

A late 19th century family taking a stroll down a set of railroad tracks
A late 19th century family taking a stroll down a set of railroad tracks

American children of the 19th century had a reputation. Returning British visitors reported on American kids who showed no respect, who swore and fought, who appeared — at age 10 — “calling for liquor at the bar, or puffing a cigar in the streets,” as one wrote. There were really no children in 19th-century America, travelers often claimed, only “small stuck-up caricatures of men and women.”

 

This was not a “carefree” nation, too rough-hewed to teach proper manners; adults deliberately chose to express new values by raising “go-ahead” boys and girls. The result mixed democracy and mob rule, assertiveness and cruelty, sudden freedom and strict boundaries. Visitors noted how American fathers would brag that their disobedient children were actually “young republicans,” liberated from old hierarchies. Children were still expected to be deferential to elders, but many were trained to embody their nation’s revolutionary virtues. “The theory of the equality” was present at the ballot box, according to one sympathetic Englishman, but “rampant in the nursery.”

 

Boys, in particular, spent their childhoods in a rowdy outdoor subculture. After age 5 or so they needed little attention from their mothers, but were not big enough to help their fathers work. So until age 10 or 12 they spent much of their time playing or fighting.

 

The writer William Dean Howells recalled his ordinary, violent Ohio childhood, immersed in his loose gang of pals, rarely catching a “glimpse of life much higher than the middle of a man.” Howells’s peers were “always stoning something,” whether friends, rivals or stray dogs. They left a trail of maimed animals behind them, often hurt in sloppy attempts to domesticate wild pets.

 

And though we envision innocents playing with a hoop and a stick, many preferred “mumbletypeg” — a game where two players competed to see who could throw a knife closer to his own foot. Stabbing yourself meant a win by default.

 

Left to their own devices, boys learned an assertive style that shaped their futures. The story of every 19th-century empire builder — Carnegie, Rockefeller, Vanderbilt — seems to begin with a striving 10-year-old. “Boy culture” offered training for the challenges of American manhood and a reprieve before a life of labor.

 

But these unsupervised boys also formed gangs that harassed the mentally ill, the handicapped and racial and ethnic minorities. Boys played an outsize role in the anti-Irish pogroms in 1840s Philadelphia, the brutal New York City draft riots targeting African-Americans during the Civil War and attacks on Chinese laborers in Gilded Age California. These children did not invent the bigotry rampant in white America, but their unrestrained upbringing let them enact what their parents mostly muttered.

 

Their sisters followed a different path. Girls were usually assigned more of their mothers’ tasks. An 8-year-old girl would be expected to help with the wash or other physically demanding tasks, while her brother might simply be too small, too slow or too annoying to drive the plow with his father. But despite their drudgery, 19th-century American girls still found time for tree climbing, bonfire building and waterfall-jumping antics. There were few pretty pink princesses in 19th-century America: Girls were too rowdy and too republican for that.

 

So how did we get from “democratic sucklings” to helicopter parents? Though many point to a rise of parental worrying after the 1970s, this was an incremental change in a movement that began a hundred years earlier.

 

In the last quarter of the 19th century, middle-class parents launched a self-conscious project to protect children. Urban professionals began to focus on children’s vulnerabilities. Well-to-do worriers no longer needed to raise tough dairymaids or cunning newsboys; the changing economy demanded careful managers of businesses or households, and restrained company men, capable of navigating big institutions.

 

Demographics played a role as well: By 1900 American women had half as many children as they did in 1800, and those children were twice as likely to live through infancy as they were in 1850. Ironically, as their children faced fewer dangers, parents worried more about their protection.

 

Instead of seeing boys and girls as capable, clever, knockabout scamps, many reconceived children as vulnerable, weak and naïve. Reformers introduced child labor laws, divided kids by age in school and monitored their play. Jane Addams particularly worked to fit children into the new industrial order, condemning “this stupid experiment of organizing work and failing to organize play.”

 

There was good reason to tame the boys and girls of the 19th century, if only for stray cats’ sake. But somewhere between Jane Addams and Nancy Grace, Americans lost track of their larger goal. Earlier parents raised their kids to express values their society trumpeted.

 

“Precocious” 19th-century troublemakers asserted their parents’ democratic beliefs and fit into an economy that had little use for 8-year-olds but idealized striving, self-made men. Reformers designed their Boy Scouts to meet the demands of the 20th century, teaching organization and rebalancing the relationship between play and work. Both movements agreed, in their didactic ways, that playtime shaped future citizens.

 

Does the overprotected child articulate values we are proud of in 2014? Nothing is easier than judging other peoples’ parenting, but there is a side of contemporary American culture — fearful, litigious, controlling — that we do not brag about but that we reveal in our child rearing, and that runs contrary to our self-image as an open, optimistic nation. Maybe this is why sheltering parents come in for so much easy criticism: A visit to the playground exposes traits we would rather not recognize.

 

There is, however, a saving grace that parents will notice this summer. Kids are harder to guide and shape, as William Dean Howells put it, “than grown people are apt to think.” It is as true today as it was two centuries ago: “Everywhere and always the world of boys is outside of the laws that govern grown-up communities.” Somehow, they’ll manage to go their own way.

 

________________________________

 

A National Endowment for the Humanities fellow at the Massachusetts Historical Society who is writing a book on the role of young people in 19th-century American democracy.

0 Comments

Mon

21

Apr

2014

Investigating Family's Wealth, China's Leader Signals a Change

From The New York Times 

By CHRISTOPHER DREW and JAD MOUAWAD

APRIL 19, 2014

 

HONG KONG — His son landed contracts to sell equipment to state oil fields and thousands of filling stations across China. His son’s mother-in-law held stakes in pipelines and natural gas pumps from Sichuan Province in the west to the southern isle of Hainan. And his sister-in-law, working from one of Beijing’s most prestigious office buildings, invested in mines, property and energy projects.

 

In thousands of pages of corporate documents describing these ventures, the name that never appears is his own: Zhou Yongkang, the formidable Chinese Communist Party leader who served as China’s top security official and the de facto boss of its oil industry.





A visitor at the Zhou family's ancestral graves in Xiqliantou, eastern China.  Intrigue surrounds the family after a spate of arrests.  Sim Chi Yim for the New York Times
A visitor at the Zhou family's ancestral graves in Xiqliantou, eastern China. Intrigue surrounds the family after a spate of arrests. Sim Chi Yim for the New York Times

But President Xi Jinping has targeted Mr. Zhou in an extraordinary corruption inquiry, a first for a Chinese party leader of Mr. Zhou’s rank, and put his family’s extensive business interests in the cross hairs.

 

Even by the cutthroat standards of Chinese politics, it is a bold maneuver. The finances of the families of senior leaders are among the deepest and most politically delicate secrets in China. The party has for years followed a tacit rule that relatives of the elite could prosper from the country’s economic opening, which rewarded loyalty and helped avert rifts in the leadership.

Zhou Family Ties

1 Comments

Fri

13

Nov

2015

Are Languages Products of their Environment?


shutterstock_222422665_151112


DISCOVER MAGAZINE published this very interesting article: 


  Languages Are Products of Their Environments


The characteristics that make each language unique may actually be adaptations to the acoustics of different environments.

2 Comments

Tue

03

Jun

2014

The Case for Reparations

 

The Case for Reparations

 

Two hundred fifty years of slavery. Ninety years of Jim Crow. Sixty years of separate but equal. Thirty-five years of racist housing policy. Until we reckon with our compounding moral debts, America will never be whole.

 

By Ta-Nehisi Coates

May 21, 2014

 


Chapters

  1. I. “So That’s Just One Of My Losses”
  2. II.  “A Difference of Kind, Not Degree”
  3. III. “We Inherit Our Ample Patrimony”
  4. IV. “The Ills That Slavery Frees Us From”
  5. V. The Quiet Plunder
  6. VI. Making The Second Ghetto
  7. VII. “A Lot Of People Fell By The Way”
  8. VIII. “Negro Poverty is not White Poverty”
  9. IX. Toward A New Country
  10. X. “There Will Be No ‘Reparations’ From Germany”
0 Comments

Mon

02

Jun

2014

A Look At 19th Century Children In The USA

PHILADELPHIA — DINNER with your children in 19th-century America often required some self-control. Berry stains in your daughter’s hair? Good for her. Raccoon bites running up your boy’s arms? Bet he had an interesting day.

 

As this year’s summer vacation begins, many parents contemplate how to rein in their kids. But there was a time when Americans pushed in the opposite direction, preserved in Mark Twain’s cat-swinging scamps. Parents back then encouraged kids to get some wildness out of their system, to express the republic’s revolutionary values.

The New York Times

Sunday Review

By JON GRINSPAN MAY 31, 2014

 

A late 19th century family taking a stroll down a set of railroad tracks
A late 19th century family taking a stroll down a set of railroad tracks

Read More 0 Comments

Mon

21

Apr

2014

Investigating Family's Wealth, China's Leader Signals a Change

From The New York Times 

By CHRISTOPHER DREW and JAD MOUAWAD

APRIL 19, 2014

 

HONG KONG — His son landed contracts to sell equipment to state oil fields and thousands of filling stations across China. His son’s mother-in-law held stakes in pipelines and natural gas pumps from Sichuan Province in the west to the southern isle of Hainan. And his sister-in-law, working from one of Beijing’s most prestigious office buildings, invested in mines, property and energy projects.

 

In thousands of pages of corporate documents describing these ventures, the name that never appears is his own: Zhou Yongkang, the formidable Chinese Communist Party leader who served as China’s top security official and the de facto boss of its oil industry.





A visitor at the Zhou family's ancestral graves in Xiqliantou, eastern China.  Intrigue surrounds the family after a spate of arrests.  Sim Chi Yim for the New York Times
A visitor at the Zhou family's ancestral graves in Xiqliantou, eastern China. Intrigue surrounds the family after a spate of arrests. Sim Chi Yim for the New York Times

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