Evolution vs. Natural Selection
It’s clear I have interwebs at the moment
but I won’t be arsed to do the daily palaeo news until I return home at the end of next month. On the brighter side I’ve queued some reblogs and the daily journal article for next week.
As always, hoping you all are well.
"Understanding the structure and variation of Homo sapiens populations in Africa is critical for interpreting multiproxy evidence of their subsequent dispersals into Eurasia. However, there is no consensus on early H. sapiens demographic structure, or its effects on intra-African dispersals. Here, we show how a patchwork of ecological corridors and bottlenecks triggered a successive budding of populations across the Sahara. Using a temporally and spatially explicit palaeoenvironmental model, we found that the Sahara was not uniformly ameliorated between ∼130 and 75 thousand years ago (ka), as has been stated. Model integration with multivariate analyses of corresponding stone tools then revealed several spatially defined technological clusters which correlated with distinct palaeobiomes. Similarities between technological clusters were such that they decreased with distance except where connected by palaeohydrological networks. These results indicate that populations at the Eurasian gateway were strongly structured, which has implications for refining the demographic parameters of dispersals out of Africa” (read more/open access).
re: penguins’ knees
They have ‘em, they’re just hidden in a sack of skin that envelopes most of their lower extremities.
X-ray images via New England Aquarium
Featherless baby penguin born at Laohutan Pole Aquarium, Dalian, China, via Today.com
Seal are morphologically similar. See where the tibia come out and how the tissue is connected all the way down to where the tail is between the feet.
“The Carpathian basin provides abundant lithic raw material sources for stone tools. In spite of their abundance, Gravettian lithic assemblages contain raw materials from north and east of the Carpathians. Bodrogkeresztúr–Henye assemblage from Northeastern Hungary is one of the sites yielding an exotic stone assemblage. The procurement strategy of these raw materials has not been discussed until now in the theoretical background of forager societies. The present study demonstrates that Gravettian lithic procurement strategy was opportunistic, most probably embedded in daily foraging, and the technology was adapted to the natural stone environment and anticipated needs during mobility. Although the exotic stones are of high quality and apparently the result of thorough selectivity, those seem to have been acquired with the same strategy, and the reason why those are present in the Bodrogkeresztúr–Henye assemblage is that they were taken as a mobile toolkit, and arrived at the site exposed to curation for a long time” (read more/open access).
(Open access source: Quaternary International, in press 2014 via Academia.edu)
This is pretty solid. There’s often a small inner pouch on the side that lies against your spine where you can pack the heavy stuff compactly. My Osprey was moulded to my body shape and is designed for people with breasts, so the large straps are oriented slightly differently to make room for boob bulk. If you tighten all the compression straps, tightly pull the straps across your clavicles and waist, and tighten the top bit so the topmost compartment doesn’t sag, the weight will distribute so as to not strain your muscles well beyond all holy hell. It will still be heavy if you pack a great lot but you won’t have that dragging agony on your neck and shoulders, nor will you want to collapse from lower back pain every time you bend and stand. Backpacks aren’t cheap but if you travel often, it’s worth the investment.
***What to take: dental floss too.
***What to leave: take your hands off my interwebs. I need Google maps, thank you kindly.
#2RISE FUTURISTIC MEDICAL INTERFACEThis interactive touch screen presentation is an outstanding example for the importance of nice interfaces. With them you are able to show information in a whole new way and exploring data is an adventure every time!
We created a vertical interactive touch screen presentation that was controlled by a mobile device. We only focused on the futuristic design and the beautiful interfaces . Our aim – the future is here and now!
Our touch screen presentations bring the future directly to your exhibition stand, shop, museum, hospital or even your tv show or movie! No prerendered elements! It’s realtime!
- by Ceri Shipton, S. Mishra, K. Paddayya, Sushama G. Deo, J.N. Pal, N. Roseboom, C. Gaillard, M.C. Gupta and Y. Hou
“The Indian Acheulian is now known to have endured for around one and a half million years. Several authors have identified temporal patterns in behaviour, particularly in relation to shaped bifaces, which may be discerned over this vast timescale. These chronological trends include a decrease in mean biface size; an increase in the relative thinness of bifaces; a decrease in the elongation of bifaces; an increase in biface flake scar density; a decrease in the shape variation of bifaces; an increase in the size variation of bifaces; a decrease in the proportion of bifaces in an assemblage; an increase in the use of flake blanks; and an increase in the use of cryptocrystalline materials. Here we statistically test these patterns by comparing a series of four earlier Acheulian assemblages from Isampur, Morgaon, Chirki-on-Pravara and Singi Talav with a series of four later Acheulian assemblages from Teggihalli II, Mudnur X, Bhimbetka IIIF-23, and Patpara. Our results indicate that many of the proposed patterns are real, and we offer some interpretations as to what they represent for the evolution of hominin behaviour and cognition” (read more/open access).
A very useful free online tutorial introducing all sorts of interesting stuff about primate characteristics, classification and other interesting primatological happenings…