понедельник, 15 июля 2019 г.

Cullerlie Prehistoric Stone Circle and Cist Cairn settings, Cullerlie, Aberdeenshire,...

Cullerlie Prehistoric Stone Circle and Cist Cairn settings, Cullerlie, Aberdeenshire, 6.7.19.












Source link


Asiatic East Germanics

Around a third of the ancient individuals in my dataset associated with East Germanic-speaking cultures show obvious ancestry from Central and/or West Asia.
This shouldn’t be too surprising, considering, for instance, the well documented contacts between East Germanic tribes and the Avars, Huns and other nomadic groups that streamed into Europe from the Asian steppes during the Migration Period. It’s a topic that I’ve raised before at this blog (see here).
But the curious thing is that very little, if any, of this ancestry has percolated down to present-day Europeans.
The easiest way to show this is with a Principal Component Analysis (PCA) based on my Global25 data. The relevant PCA datasheet can be downloaded here. Basic details about the ancient samples in the analysis are available here.



In the first PCA some of the Northeastern European populations, particularly the Uralic speakers, appear to be attracted to the Hunnic cluster. However, this is mostly an artifact of pre-Migration Period east to west population expansions in the far north of Europe, probably including those of the Proto-Uralians (see here).
So how is it that, despite ruling over vast areas of Europe for hundreds of years, the East Germanics appear not to have contributed significantly to the present-day European gene pool? My theory is that, much like the Avars and Huns, they were militarily and demographically overwhelmed by the ascending groups around them, such as the Slavs, and they simply went extinct.
To wrap things up, here are a few very quick qpAdm mixture models, including one for the new samples from the Chernyakhiv culture. Note the significant slice of Hun-related admixture in these likely early Goths. Is it real? Feel free to share your thoughts in the comments below.



UKR_Chernyakhiv
DEU_MA 0.863±0.038
Hun_Tian_Shan 0.137±0.038
chisq 12.525
tail prob 0.325466
Full output
Swedish
Baltic_EST_IA 0.126±0.078
DEU_MA 0.849±0.073
Hun_Tian_Shan 0.025±0.020
chisq 8.338
tail prob 0.595877
Full output
Ukrainian
Baltic_EST_IA 0.121±0.064
DEU_MA 0.857±0.060
Hun_Tian_Shan 0.022±0.017
chisq 11.458
tail prob 0.322956
Full output
Estonian
Baltic_EST_IA 0.597±0.069
DEU_MA 0.373±0.064
Hun_Tian_Shan 0.030±0.017
chisq 15.739
tail prob 0.107361
Full output



See also…
New PCA featuring Botai horse tamers, Hun and Saka warriors, and many more…
More on the association between Uralic expansions and Y-haplogroup N
Uralic-specific genome-wide ancestry did make a signifcant impact in the East Baltic
Source


Chasing Tails Sperm need to generate a lot of power – the race…


Chasing Tails


Sperm need to generate a lot of power – the race to fertilise an egg whittles the competition down from 100,000 to one (or perhaps two). To assess the fittest swimmers, ‘sperm counts’ often look for bobbing heads (white) – to see how eager the cells are for this important swim. Here a new combination of techniques focusses on where the power for the journey ahead comes from – the tail. Each flagellum waves and beats to propel the sperm egg-wards, producing patterns with more subtleties than the sperm’s head movements. These two human sperm have their tail patterns tracked – with the sperm on the right ‘hyperactive’ after a chemical treatment. A mathematical model trained with these experiments can now predict tiny changes in forces and energy required for the sperm to travel effectively. Relating this to fertility may help with future treatments, or with selection of ‘healthy’ sperm for procedures like in vitro fertilisation.


Written by John Ankers



You can also follow BPoD on Instagram, Twitter and Facebook


Archive link


2019 July 15 The Space Station Crosses a Spotless Sun Image…


2019 July 15


The Space Station Crosses a Spotless Sun
Image Credit & Copyright: Rainee Colacurcio


Explanation: That’s no sunspot. It’s the International Space Station (ISS) caught passing in front of the Sun. Sunspots, individually, have a dark central umbra, a lighter surrounding penumbra, and no solar panels. By contrast, the ISS is a complex and multi-spired mechanism, one of the largest and most sophisticated machines ever created by humanity. Also, sunspots occur on the Sun, whereas the ISS orbits the Earth. Transiting the Sun is not very unusual for the ISS, which orbits the Earth about every 90 minutes, but getting one’s timing and equipment just right for a great image is rare. Strangely, besides that fake spot, in this recent two-image composite, the Sun lacked any real sunspots. The featured picture combines two images – one capturing the space station transiting the Sun – and another taken consecutively capturing details of the Sun’s surface. Sunspots have been rare on the Sun since the dawn of the current Solar Minimum, a period of low solar activity. For reasons not yet fully understood, the number of sunspots occurring during both the previous and current solar minima have been unusually low.


∞ Source: apod.nasa.gov/apod/ap190715.html


Selenite | #Geology #GeologyPage #Mineral Locality: Red River…


Selenite | #Geology #GeologyPage #Mineral


Locality: Red River Floodway, Winnipeg, Manitoba, Canada


Size: 5 x 4.5 x 3.4 cm


Photo Copyright © Anton Watzl Minerals


Geology Page

www.geologypage.com

https://www.instagram.com/p/Bz6Yj4mAxu4/?igshid=nq7vpsewrck0


Tomnavrie Prehistoric Recumbent Stone Circle, Tarland, Aberdeenshire, 6.7.19.


Tomnavrie Prehistoric Recumbent Stone Circle, Tarland, Aberdeenshire, 6.7.19.











Source link


Malachite | #Geology #GeologyPage #Mineral Locality: Smetanina,…


Malachite | #Geology #GeologyPage #Mineral


Locality: Smetanina, Nizhnetagilskii Massif, Nizhnii-Tagil, Sverdlovskaya Oblast, Middle Urals, Russia


Dimensions: 6.5 × 5.0 × 2.6 cm


Photo Copyright © Crystal Classics


Geology Page

www.geologypage.com

https://www.instagram.com/p/Bz6C0QNgbwr/?igshid=17v2aqisur0gq


Curved slickenlines preserve the direction of rupture…


Curved slickenlines preserve the direction of rupture propagation http://www.geologypage.com/2019/07/curved-slickenlines-preserve-the-direction-of-rupture-propagation.html


Chrysocolla | #Geology #GeologyPage #Mineral Locality:…


Chrysocolla | #Geology #GeologyPage #Mineral


Locality: Rheinbreitbach, Rhineland-Palatinate, Germany, Europe


Dimensions: 9.0 × 7.4 × 4.7 cm


Photo Copyright © Crystal Classics


Geology Page

www.geologypage.com

https://www.instagram.com/p/Bz6WjRhgVAL/?igshid=g6iggtzeu1j3


Cerussite with Malachite | #Geology #GeologyPage…


Cerussite with Malachite | #Geology #GeologyPage #Mineral


Locality: Pfingstwiese Mine, Bad Ems, Bad Ems District, Lahn Valley, Rhineland-Palatinate, Germany, Europe


Dimensions: 5.3 × 4.0 × 3.6 cm


Photo Copyright © Crystal Classics


Geology Page

www.geologypage.com

https://www.instagram.com/p/Bz6XHQRgx4-/?igshid=x2sccojx74am


St Vigeans Pictish Sculptured Stones Photoset 2, St Vigeans, Arbroath, Angus, 7.7.19....




St Vigeans Pictish Sculptured Stones Photoset 2, St Vigeans, Arbroath, Angus, 7.7.19.


Decorated stone slabs and altar bases.


Source link


St. Vigeans Pictish Sculptured Stones Photoset 3, St. Vigeans, Arbroath, Angus, 7.7.19.

St. Vigeans Pictish Sculptured Stones Photoset 3, St. Vigeans, Arbroath, Angus, 7.7.19.







Source link


Featured

    Солнечное затмение 14 декабря 2020 года  — полное  солнечное затмение  142  сароса , которое лучше всего будет видно в юго-восточной час...

Popular