Profile

Cover photo
Peter Harris
8,278 followers|1,296,449 views
AboutPostsCollectionsPhotosYouTube+1'sReviews

Stream

Peter Harris

Shared publicly  - 
 
one of the main men in search of near earth objects
Richard A. Kowalski is a Senior Research Specialist with the Lunar & Planetary Laboratory's Catalina Sky Survey, located at the University of Arizona in Tucson. Entering the field as an amateur in the 1990s, he created and has continued to maintain the Minor Planet Mailing List since 1997. This...
1
Add a comment...

Peter Harris

Shared publicly  - 
 
with +Creative Commons 
A toy building brick can be whatever you imagine it to be, or even something you've never imagined. Braille Bricks is an experiment that transforms these bricks into a tool capable of encouraging creativity, helping blind children learn to read and write. It also encourages the inclusion of children with or without visual impairment. Cool, right? So find out more about the project here.
1
Add a comment...

Peter Harris

Shared publicly  - 
 
tim peake took the pyramids in
Competition time – how many Pyramids do you spot in this pic? Credits: ESA/NASA 139B2194_a
1
Add a comment...

Peter Harris

Shared publicly  - 
1
Add a comment...

Peter Harris

Shared publicly  - 
1
Add a comment...

Peter Harris

Shared publicly  - 
 
this was #bbctomorrowsworld last twinkling could not do anything about it until now how to recycle cow methane


it so happens that the 21st anniversay edition will be thirty years this week

http://www.bbc.co.uk/archive/tomorrowsworld/8027.shtml
Most of us consider farts to be little more than a mild embarrassment. But cow farts (and burps) are a scourge upon the Earth.
1
Add a comment...
Have them in circles
8,278 people
Barbara Huggins's profile photo
Lay-Lay D.'s profile photo
Tamara Szostak's profile photo
Nick VanGiesen's profile photo
Techno Crunch's profile photo
Aubrey Griffin's profile photo
Work From Home Opportunity's profile photo
Monmouth County Divorce Lawyers's profile photo
Phoebe J. Dearing's profile photo

Peter Harris

Shared publicly  - 
1
Add a comment...

Peter Harris

Shared publicly  - 
 
 
Evolution in Action: A genetic adaptation has allowed a non-native horse breed to weather extreme arctic conditions successfully; these changes have settled in and begun to define this breed all within about 100 generations...

Similar mutations have spread within Siberian human populations and among other ancient cold-climate critters, like the woolly mammoth.

~RA

*

The resilient Yakutian horses are one of the great native sights of the Sakha Republic - or Yakutia. In their way as much a part of the classic Siberian scenery as permafrost, extinct woolly mammoths, diamonds and Laika dogs in this kingdom of cold. Except that these horses are not really native.

Fascinating new scientific research has found that their seemingly built-in protection against extreme Arctic conditions is a recent phenomenon, at least by the normal tortoise-paced standards of evolution.

Researchers say these horses, which seem so well attuned to the harsh cold with thick, dense winter coats, their armour against temperatures of minus 70C (minus 94F), are incomers that only arrived in these parts within the last 800 years. Yet during that time, the requirement to survive has seen a quick-fire - almost overnight in relative terms - evolution by this species of horse.

Moreover, there was indeed a breed of horses native to this vast area of Russia, in which lie the coldest permanently inhabited communities on the planet. But these true native horses became extinct, at roughly the same time as the woolly mammoth and rhinoceros also died out, finally disappearing around 5,000 years ago.

It transpires that a human population migrating within the last millennium to this land of ice - probably from Mongolia - brought horses with them, and these are the ancestors of today's distinctive Yakut horses, shown in our pictures.

'This is truly amazing as it implies that all traits now seen in Yakutian horses are the product of very fast adaptive processes, taking place in about 800 years,' explained Dr Ludovic Orlando, leader of an international team of scientists.

'This represents about 100 generations for horses. That shows how fast evolution can go when selective pressures for survival are as strong as in the extreme environment of Yakutia.'

The forebears of today's hardy horses are the domesticated stock of Mongolia, not the wild horses known to have roamed Yakutia in ancient times, a species that remains today only in fossil form. Yet these migrant horses were central to the lives of the population that settled in Yakutia: had these animals not coped with, and thrived on, the cold, these human societies would not have survived.

'We know now that the extinct population of wild horses survived in Yakutia until 5,200 years ago,' he said. 'It extended from the Taymir peninsula to Yakutia, and probably all across the entire Holarctic region. In Yakutia, it may have become extinct prior to the arrival of Yakut people and their horses. Judging from the genome data, modern Yakutian horses are no closer to the extinct population than is any other domesticated horse.'

The research pinpointed the genes responsible for this supersonic evolution, finding similarities with both indigenous Siberian people and even woolly mammoths. Among them TGM3, involved in hair development, which may be responsible for the Yakutian horse's distinctive shaggy look, a key to shielding them from cold living outside all year round. The adaptations, many of them regulatory, also involved vasoconstriction, body size, hormones, and metabolism.

Researcher Dr Pablo Librado said: 'In addition to unveiling their evolutionary origins, our approach helped narrow down the genetic basis of adaptations that are unique to Yakutian horses. In one word, their genetic makeup.

We also found genes that were reported to have undergone selection in other Arctic populations, such as indigenous Siberian humans, and even the woolly mammoth. It provides a compelling example of evolutionary convergence, where unrelated groups exposed to similar
environments end up independently developing similar adaptations.'

The research included genome sequencing on nine modern-day Yakutian horses, plus two ancient horse samples from this region, one from the early 19th century, and another 5,200 years old.

The genomes were then compared to one another, and to existing sequences for dozens of domestic, still-wild Przewalski's, and ancient horses. As for the earlier, extinct horses in this region, for example as seen in ancient remains on the Taymyr Peninsula, bore no close relationship to today's Yakutian horse population, and no more than to any modern breeds.

'The population from the Taymyr peninsula does not coincide with anything that paleontologists have ever described,' said Dr Orlando.

This group is estimated to have diverged from the modern horse lineage around 160,000 years ago, the researchers estimate. They were as diverged from modern horses as humans are from Neanderthals, he said.

Russian scientist Artem Nedoluzhko, head of the Laboratory of Bioinformatics and Genomics Research of Kurchatov Institute, in Moscow, who was involved in the research, said: 'We have shown that the Yakutian horse is one of the fastest cases of adaptation to the extreme Arctic temperatures.

'In the genome of the Yakutian horses, we found the mutations that help the adaptation: revealed genes involved in the development of hair, affecting the body size, metabolic and hormonal signaling ways. The changes found in the genome of Yakutian horses are an essential part of the adaptive genetic tools of the body.

'In addition, we found evidence of convergent evolution of the Yakutian horse with human populations that live in Siberia and mammoths, suggesting the existence of multiple evolutionary strategies needed to survive in extreme climatic conditions.'

Dr Orlando is from the Centre for GeoGenetics at the Natural History Museum of Denmark, part of the University of Copenhagen. Findings were published in the Proceedings of the National Academy of Sciences of the USA.
Fast track evolution as great Siberian symbol is surprisingly unmasked as an immigrant breed.
View original post
1
Add a comment...

Peter Harris

Shared publicly  - 
 
if this is cinderella who is rockafellow
See this Instagram video by @zacposen • 100.7k likes
1
Add a comment...

Peter Harris

Shared publicly  - 
 
Deconstructing the party of the year, including how much it costs, who hosts, and what you have to wear.
1
Add a comment...
Peter's Collections
People
Have them in circles
8,278 people
Barbara Huggins's profile photo
Lay-Lay D.'s profile photo
Tamara Szostak's profile photo
Nick VanGiesen's profile photo
Techno Crunch's profile photo
Aubrey Griffin's profile photo
Work From Home Opportunity's profile photo
Monmouth County Divorce Lawyers's profile photo
Phoebe J. Dearing's profile photo
Links
Peter Harris's +1's are the things they like, agree with, or want to recommend.
Music Is Better Than Words
market.android.com

Music Is Better Than Words is a traditional big-band album from Seth MacFarlane, the wise-ass behind "Family Guy". MacFarlane plays it strai

Immunity
market.android.com

Following 2011's Diamond Mine, his acclaimed, Mercury-nominated collaboration with Fence Records' founder King Creosote, Immunity is the fou

Lytro Illum Light Field Camera - Lytro Light Field Camera
www.speedgraphic.co.uk

The Illum uses revolutionary light ray capture technology to create interactive images in three dimensions

T La Rock
market.android.com

The older sibling of Treacherous Three's Special K, T la Rock's greatest contribution to hip-hop was "It's Yours," a 1984 single produced by

Back To The Story
market.android.com

The Idle Race are a beloved band of British psychedelia collectors, because the music was rare, because the band was Jeff Lynne's first sign

Turn It Up (Louder)
market.android.com

Few starlets have ever had a name as fitting as Pixie Lott, the teenage thrush whose debut, Turn It Up, turned her into something of a Europ

A Dictionary of Symbols - Juan Eduardo Cirlot - Google Books
books.google.co.uk

books.google.co.uk - Humans, it's said, are symbolizing animals. At every stage of civilization, people have relied on symbolic expression,

Talking Heads
market.android.com

At the start of their career, Talking Heads were all nervous energy, detached emotion, and subdued minimalism. When they released their last

Caran d'Ache Caelograph Zenith 45, 23 diam, Rose Gold Massif Fountain Pe...
www.penshop.co.uk

Caran d'Ache Caelograph Zenith 45, 23 diam, Rose Gold Massif Fountain Pen from Caran d'Ache - buy yours today with fast delivery from The Pe

Caran d'Ache Cubrik Fountain Pen - Caran d'Ache
www.penshop.co.uk

Caran d'Ache Cubrik Fountain Pen from Caran d'Ache - buy yours today with fast delivery from The Pen Shop.com!

Jay Lumen It's All About Me Chart (august) :: Jay Lumen
www.beatport.com

The new EP with Green Velvet is out now! http://www.beatport.com/release/its-all-about-me/1351030

have used several times amazon could take a leaf out of their book regarding logistics just loveable people with a lens range to match one item was the 800mm canon made only to order
Public - a month ago
reviewed a month ago
first public house to have stairs down was beyond average and if your a camra member you get more
Public - a month ago
reviewed a month ago
I had trouble finishing the manhattan competting prime steak if I could buy this at the supermarket I'd know it suggested by groupon but is an out of the way venue but with a swordid history which needs careful management
Public - 2 months ago
reviewed 2 months ago
was recommended by my sister and is very reliable have used them three times to go to london heathrow what with traffic these days and train timetables it's takes a lot off your mind
Public - 5 months ago
reviewed 5 months ago
29 reviews
Map
Map
Map
liz was at the new maidstone branch and was masterly at getting the whole show going would recommend a video tech line if tech staffing uneconomical fri 19th feb
Public - 2 months ago
reviewed 2 months ago
when they were in pudding lane they were the areas top technical arts house for printing
Public - 4 months ago
reviewed 4 months ago
love the service now your on the map jas
Public - 7 months ago
reviewed 7 months ago