Many of you ‘Liked’ the pictures from last Sunday’s Small pause today post. Those pictures were sent to me by Cynthia, wife of long-time friend Dan Gomez.
So I decided to present another set, this time sent to me by Suzann, who is Dan’s sister. Again, they are beautiful albeit very different images.
Northern Lights Over Teepees
(NORTHERN LIGHTS, YELLOW KNIFE, CANADA )
Now check out that thermometer!
Now more beautiful images.
The next picture is a fire rainbow; the rarest natural phenomenon in the atmosphere. The picture was taken on the Idaho Washington border and the event lasted for about an hour.
Apparently, the clouds have to be cirrus of an altitude of 20,000 feet with just the right proportion of ice crystals. Then the sunlight has to illuminate the clouds at precisely 58 degrees to the horizontal.
Sunset at the North Pole
Another rare picture taken when the moon was closest to the earth. Taken Thursday, the 13th. of March 2011.
Note how unusual it is to see the sun below the moon!
Many of you will have watched the video of the dolphins being rescued off a Brazilian beach that I published a week ago under the title of Wet eyes warning. That was sent to me by Capt. Bob. Bob, like my son, is a commercial airline captain.
Now Bob has sent me this. Some day, I’ll natter on about my own amateur love affair with flying, both gliding (sailplane in USA speak) and power. But for now just marvel at the skills on display as in the name of fire control these crews quite deliberately do all the things that most would consider suicidal in aviation affairs.
Just a wonderful set of very heart-warming pictures.
Note: These were sent to me by John H. back on the 13th October, our penultimate Saturday in Arizona. I thought they would make a perfect start to our first November week-end in Merlin, Oregon.
There are twenty-two in total; eleven today and the rest tomorrow.
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The concluding glorious eleven photographs tomorrow.
Dogs’ evolution shows why they ‘love’ gnawing on bones.
This is the second article on the BBC Nature website following yesterday’s item about why dogs enjoy a healthy breakfast.
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Dogs’ evolution shows why they ‘love’ gnawing on bones
By Victoria Gill
Science reporter, BBC Nature, Ottawa, Canada
Social living drove dogs to evolve the “tools” for chewing bones, scientists say
Scientists say they have discovered why dogs love to eat meat and bones.
Ancient canines adopted pack-living about eight million years ago, to hunt larger prey, according to researchers.
The resulting evolution of their jaws gradually turned the ancestors of modern wolves, and ultimately our own pets, into “hypercarnivores”.
Dr Joao Munoz-Doran presented the findings at the First Joint Congress for Evolutionary Biology in Ottawa, Canada.
He and his colleagues from the National University of Colombia have created a canine “family tree”, piecing together the relationships between each of the more than 300 dog species.
“We compared species that have very different diets,” Dr Munoz-Doran explained to BBC Nature. “So we classified them as carnivores, hypercarnivores [animals that eat more than 70% meat] and omnivores [animals that eat meat and vegetation].”
The ancestors of modern wolves belong to this hypercarnivorous group.
The team’s analysis showed that the skull features that now distinguish a wolf – strong jaw muscles and enlarged canine teeth – first started to develop when their ancestors first began hunting in groups.
“We found a common evolutionary history for these traits,” Dr Munoz-Doran explained. “Eight million years ago was when [less forested, more] open habitats were spreading through Asia, Europe and North America. And when there are open habitats, the big prey group together. So there will be more eyes watching for a predator.”
The only way that dogs roaming the open plains could snatch very large prey from a herd was to work together.
“And after many generations of this grouping behaviour, there are new selective pressures on their [skull shape],” said the researcher.
This pressure meant that animals with larger teeth and stronger jaws were more likely to succeed in hunting, and to survive to pass on their large-toothed, strong-jawed genes to the next generation.
Animals with stronger jaws and larger canine teeth would have been more successful hunters
“They developed strength in their muscles – especially the muscles that close their mouth,” said Dr Munoz-Doran. “And bones that are more resistant to bending, so they could support the mechanical strains of biting the prey. “Over time, they became adapted to be ‘hypercarnivorous’.”
The researcher pointed out that domestic dogs had “very good evolutionary reasons to enjoy chewing a bone”.
“They have the tools to do that,” he told BBC Nature, “and they want to use their tools.”
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Finally, to the side of that BBC Nature webpage were a few canine facts, as follows:
Common canines: Foxes, wolves, jackals, coyotes and dingoes are all members of this well-known group
Familiar faces: Wild canids are found on every continent except Antarctica
Communication is key: Previous studies of dog evolution have revealed that calls were essential for forming social groups and hunting larger prey
Pets’ past: All domestic dogs are descendants of the grey wolf
And don’t close without going here and listening to Steve Backshall howling with a wolf pack – (it’s a video as well – unmissable).
This first published on the 4th November, 2009 when we were living in Mexico.
Here in San Carlos, Mexico, we have good sunrises most mornings. But this one made me grab my camera. The picture is unedited. Very simple things can provide a huge amount of pleasure.
Taken at 06:15 local time (GMT -7hrs) Camera is a Panasonic Lumix DMC-FZ8
A fascinating item recently published by Yale University.
Apologies, time pressure allows me little more than to repeat this in full. But still no less interesting.
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Nearby super-Earth likely a diamond planet
Illustration of the interior of 55 Cancri e — an extremely hot planet with a surface of mostly graphite surrounding a thick layer of diamond, below which is a layer of silicon-based minerals and a molten iron core at the center. (Image by Haven Giguere)
October 11, 2012
New research led by Yale University scientists suggests that a rocky planet twice Earth’s size orbiting a nearby star is a diamond planet.
“This is our first glimpse of a rocky world with a fundamentally different chemistry from Earth,” said lead researcher Nikku Madhusudhan, a Yale postdoctoral researcher in physics and astronomy. “The surface of this planet is likely covered in graphite and diamond rather than water and granite.”
The paper reporting the findings has been accepted for publication in the journal Astrophysical Journal Letters.
The planet — called 55 Cancri e — has a radius twice Earth’s, and a mass eight times greater, making it a “super-Earth.” It is one of five planets orbiting a sun-like star, 55 Cancri, that is located 40 light years from Earth yet visible to the naked eye in the constellation of Cancer.
The planet orbits at hyper speed — its year lasts just 18 hours, in contrast to Earth’s 365 days. It is also blazingly hot, with a temperature of about 3,900 degrees Fahrenheit, researchers said, a far cry from a habitable world.
The planet was first observed transiting its star last year, allowing astronomers to measure its radius for the first time. This new information, combined with the most recent estimate of its mass, allowed Madhusudhan and colleagues to infer its chemical composition using models of its interior and by computing all possible combinations of elements and compounds that would yield those specific characteristics.
Star map showing the planet-hosting star 55 Cancri in the constellation of Cancer. The star is visible to the naked eye, though better through binoculars. (Image by Nikku Madhusudhan; created using Sky Map Online
Astronomers had previously reported that the host star has more carbon than oxygen, and Madhusudhan and colleagues confirmed that substantial amounts of carbon and silicon carbide, and a negligible amount of water ice, were available during the planet’s formation.
Astronomers also thought 55 Cancri e contained a substantial amount of super-heated water, based on the assumption that its chemical makeup was similar to Earth’s, Madhusudhan said. But the new research suggests the planet has no water at all, and appears to be composed primarily of carbon (as graphite and diamond), iron, silicon carbide, and, possibly, some silicates. The study estimates that at least a third of the planet’s mass — the equivalent of about three Earth masses — could be diamond.
“By contrast, Earth’s interior is rich in oxygen, but extremely poor in carbon — less than a part in thousand by mass,” says co-author and Yale geophysicist Kanani Lee.
The identification of a carbon-rich super-Earth means that distant rocky planets can no longer be assumed to have chemical constituents, interiors, atmospheres, or biologies similar to those of Earth, Madhusudhan said. The discovery also opens new avenues for the study of geochemistry and geophysical processes in Earth-sized alien planets. A carbon-rich composition could influence the planet’s thermal evolution and plate tectonics, for example, with implications for volcanism, seismic activity, and mountain formation.
“Stars are simple — given a star’s mass and age, you know its basic structure and history,” said David Spergel, professor of astronomy and chair of astrophysical sciences at Princeton University, who is not a co-author of the study. “Planets are much more complex. This ‘diamond-rich super-Earth’ is likely just one example of the rich sets of discoveries that await us as we begin to explore planets around nearby stars.”
In 2011, Madhusudhan led the first discovery of a carbon-rich atmosphere in a distant gas giant planet, opening the possibility of long-theorized carbon-rich rocky planets (or “diamond planets”). The new research represents the first time that astronomers have identified a likely diamond planet around a sun-like star and specified its chemical make-up. Follow-up observations of the planet’s atmosphere and additional estimates of the stellar composition would strengthen the findings about the planet’s chemical composition.
The authors of the paper are Madhusudhan, Lee, and Olivier Mousis, a planetary scientist at the Institut de Recherche en Astrophysique et Planetologie in Toulose, France.
The paper is titled “A Possible Carbon-rich Interior in Super-Earth 55 Cancri e.”
The research was supported by the Yale Center for Astronomy and Astrophysics (YCAA) in the Yale Department of Physics through Madhusudhan’s YCAA postdoctoral prize fellowship.
Thousands of elephants die each year so that their tusks can be carved into religious objects. Can the slaughter be stopped?
By Bryan Christy
Photographs by Brent Stirton, Reportage by Getty Images
IN JANUARY 2012 A HUNDRED RAIDERS ON HORSEBACK CHARGED OUT OF CHAD INTO CAMEROON’S BOUBA NDJIDAH NATIONAL PARK, SLAUGHTERING HUNDREDS OF ELEPHANTS—entire families—in one of the worst concentrated killings since a global ivory trade ban was adopted in 1989. Carrying AK-47s and rocket-propelled grenades, they dispatched the elephants with a military precision reminiscent of a 2006 butchering outside Chad’s Zakouma National Park. And then some stopped to pray to Allah. Seen from the ground, each of the bloated elephant carcasses is a monument to human greed. Elephant poaching levels are currently at their worst in a decade, and seizures of illegal ivory are at their highest level in years. From the air too the scattered bodies present a senseless crime scene—you can see which animals fled, which mothers tried to protect their young, how one terrified herd of 50 went down together, the latest of the tens of thousands of elephants killed across Africa each year. Seen from higher still, from the vantage of history, this killing field is not new at all. It is timeless, and it is now.
The full terrible article is here – if you have the stomach to read it.
Photograph by Brent Stirton, Reportage by Getty Images To keep the ivory from the black market, a plainclothes ranger hacks the tusks off a bull elephant killed illegally in Kenya’s Amboseli National Park. In the first half of this year six park rangers died protecting Kenya’s elephants; meanwhile, rangers killed 23 poachers.
The Hubble Space Telescope (HST) has produced one of its most extraordinary views of the Universe to date.
Called the eXtreme Deep Field, the picture captures a mass of galaxies stretching back almost to the time when the first stars began to shine.
But this was no simple point and snap – some of the objects in this image are too distant and too faint for that.
Rather, this view required Hubble to stare at a tiny patch of sky for more than 500 hours to detect all the light.
“It’s a really spectacular image,” said Dr Michele Trenti, a science team member from the University of Cambridge, UK.
Then while the BBC News item had that stunning picture, over on the NASA website there was the following image together with more information.
Called the eXtreme Deep Field, or XDF, the photo was assembled by combining 10 years of NASA Hubble Space Telescope photographs taken of a patch of sky at the center of the original Hubble Ultra Deep Field. The XDF is a small fraction of the angular diameter of the full moon.
The Hubble Ultra Deep Field is an image of a small area of space in the constellation Fornax, created using Hubble Space Telescope data from 2003 and 2004. By collecting faint light over many hours of observation, it revealed thousands of galaxies, both nearby and very distant, making it the deepest image of the universe ever taken at that time.
The new full-color XDF image is even more sensitive, and contains about 5,500 galaxies even within its smaller field of view. The faintest galaxies are one ten-billionth the brightness of what the human eye can see.
Magnificent spiral galaxies similar in shape to our Milky Way and the neighboring Andromeda galaxy appear in this image, as do the large, fuzzy red galaxies where the formation of new stars has ceased. These red galaxies are the remnants of dramatic collisions between galaxies and are in their declining years. Peppered across the field are tiny, faint, more distant galaxies that were like the seedlings from which today’s magnificent galaxies grew. The history of galaxies — from soon after the first galaxies were born to the great galaxies of today, like our Milky Way — is laid out in this one remarkable image.
Hubble pointed at a tiny patch of southern sky in repeat visits (made over the past decade) for a total of 50 days, with a total exposure time of 2 million seconds. More than 2,000 images of the same field were taken with Hubble’s two premier cameras: the Advanced Camera for Surveys and the Wide Field Camera 3, which extends Hubble’s vision into near-infrared light.
“The XDF is the deepest image of the sky ever obtained and reveals the faintest and most distant galaxies ever seen. XDF allows us to explore further back in time than ever before”, said Garth Illingworth of the University of California at Santa Cruz, principal investigator of the Hubble Ultra Deep Field 2009 (HUDF09) program.
The universe is 13.7 billion years old, and the XDF reveals galaxies that span back 13.2 billion years in time. Most of the galaxies in the XDF are seen when they were young, small, and growing, often violently as they collided and merged together. The early universe was a time of dramatic birth for galaxies containing brilliant blue stars extraordinarily brighter than our sun. The light from those past events is just arriving at Earth now, and so the XDF is a “time tunnel into the distant past.” The youngest galaxy found in the XDF existed just 450 million years after the universe’s birth in the big bang.
Before Hubble was launched in 1990, astronomers could barely see normal galaxies to 7 billion light-years away, about halfway across the universe. Observations with telescopes on the ground were not able to establish how galaxies formed and evolved in the early universe.
Hubble gave astronomers their first view of the actual forms and shapes of galaxies when they were young. This provided compelling, direct visual evidence that the universe is truly changing as it ages. Like watching individual frames of a motion picture, the Hubble deep surveys reveal the emergence of structure in the infant universe and the subsequent dynamic stages of galaxy evolution.
The infrared vision of NASA’s planned James Webb Space Telescope will be aimed at the XDF. The Webb telescope will find even fainter galaxies that existed when the universe was just a few hundred million years old. Because of the expansion of the universe, light from the distant past is stretched into longer, infrared wavelengths. The Webb telescope’s infrared vision is ideally suited to push the XDF even deeper, into a time when the first stars and galaxies formed and filled the early “dark ages” of the universe with light.
The Hubble Space Telescope is a project of international cooperation between NASA and the European Space Agency. NASA’s Goddard Space Flight Center in Greenbelt, Md., manages the telescope. The Space Telescope Science Institute (STScI) in Baltimore, Md., conducts Hubble science operations. STScI is operated by the Association of Universities for Research in Astronomy, Inc., in Washington.
What a fabulous achievement. Just think that “The faintest galaxies are one ten-billionth the brightness of what the human eye can see.” and “The history of galaxies — from soon after the first galaxies were born to the great galaxies of today, like our Milky Way — is laid out in this one remarkable image.” Plus, “The youngest galaxy found in the XDF existed just 450 million years after the universe’s birth in the big bang.”
Do you know what crosses my mind looking at the picture? All those galaxies with, presumably, tens of thousands of planets and, surely, the near certainty that intelligent life must be teeming across those trillions of miles!
Let me close with this YouTube video brought to my attention thanks to Peter Sinclair of Climate Crocks.
We’ve all seen pictures of Earth from space, but have we really taken the time to appreciate what our planet looks like against the starscapes of the Milky Way galaxy? Here, we beckon viewers to see Earth in its cosmic context, which includes the stars, interstellar gases, the moon, the sun, and the solar winds. Be sure to watch in full HD, 1080p, and imagine you’re an astronaut aboard the International Space Station with a little time on your hands.
Learning from Dogs 