# life: ancient Siberian hunters used hot pots to survive the ice age

<< A new study shows that ancient Siberian hunters created heat resistant pots so that they could cook hot meals - surviving the harshest seasons of the ice age by extracting nutritious bone grease and marrow from meat. >>

Hot pots helped ancient Siberian hunters survive the Ice Age. University of York. Feb 1, 2020.

 

https://m.phys.org/news/2020-02-hot-pots-ancient-siberian-hunters.html

<< regional differences in pottery use also map onto contrasting manufacturing techniques, with vessels from the Middle and from the Lower Amur forming distinct pottery-making traditions. These combined insights appear to indicate a greater degree of variability in the development and use of early pottery in East Asia than has hitherto been indicated. >>

Shinya Shoda, Alexandre Lucquin, et al. Late Glacial hunter-gatherer pottery in the Russian Far East: Indications of diversity in origins and use. Quaternary Science Reviews. Volume 229, 1 February 2020, 106124. doi: 10.1016/j.quascirev.2019.106124.

https://www.sciencedirect.com/science/article/abs/pii/S0277379119305013

Also (in FonT)

keyword 'nomads'

https://flashontrack.blogspot.com/search?q=nomads

keyword 'hunter-gatherer'

https://flashontrack.blogspot.com/search?q=hunter-gatherer

# life: a normal (fuzzy, bizarre) Nature jumping, the little carrier snake that can bite a world ...

<<  Reports indicate that snakes were sold in the local seafood market in Wuhan, raising the possibility that the 2019-nCoV might have jumped from the host species - bats - to snakes and then to humans at the beginning of this coronavirus outbreak. However, how the virus could adapt to both the cold-blooded and warm-blooded hosts remains a mystery. >>

Haitao Guo, Guangxiang “George” Luo, Shou-Jiang Gao. Snakes could be the original source of the new coronavirus outbreak in China. Jan 22, 2020.

https://theconversation.com/snakes-could-be-the-original-source-of-the-new-coronavirus-outbreak-in-china-130364

Wei Ji, Wei Wang, et al. Homologous recombination within the spike glycoprotein of the newly identified coronavirus may boost cross‐species transmission from snake to human. Journal of Medical Virology. doi: 10.1002/jmv.25682. Jan 22, 2020.

https://onlinelibrary.wiley.com/doi/abs/10.1002/jmv.25682

Also

here a Brazilian 'relative' of the Chinese snake ...

# life: squeezing jaraca' (Bothrops jararaca). FonT. Dec 24, 2019. 

https://twitter.com/flashontrack/status/1209527656091402243

https://flashontrack.blogspot.com/2019/12/life-squeezing-jaraca-bothrops-jararaca.html

# phys: nature does not always respect symmetry, the hypothesis

<< Physicists have been looking for laws that explain both the microscopic world of elementary particles and the macroscopic world of the universe and the Big Bang at its beginning, expecting that such fundamental laws should have symmetry in all circumstances. However, last year, two physicists found a theoretical proof that, at the most fundamental level, nature does not respect symmetry. >>

<< To try to understand gravity on the quantum level, Hirosi Ooguri, (..) and Daniel Harlow, (..) started with the holographic principle. This principle explains three-dimensional phenomena influenced by gravity on a two-dimensional flat space that is not influenced by gravity.  >>

<< The researchers showed that symmetry only affects the shaded regions in the diagram, not around the spot in the middle, thus there cannot be global symmetry.  >>

Motoko Kakubayashi. Gravity: We might have been getting it wrong this whole time. Kavli Institute for the Physics and Mathematics of the Universe. Jan 24, 2020.

https://m.phys.org/news/2020-01-gravity-wrong.html

Daniel Harlow, Hirosi Ooguri. Constraints on Symmetries from Holography. Phys. Rev. Lett. 122, 191601. doi: 10.1103/ PhysRevLett.122.191601. May 17, 2019.

https://journals.aps.org/prl/abstract/10.1103/PhysRevLett.122.191601

Daniel Harlow, Hirosi Ooguri. Symmetries in quantum field theory and quantum gravity. arXiv: 1810.05338v2 [hep-th]. Jun 6, 2019.

https://arxiv.org/abs/1810.05338

# gst: self‐assembly of porous, chiral nano-patterns from simple building blocks.

<< Using a simple rod-like building block with hydroxamic acids at both ends scientists (..) created self- assembling porous, chiral nano structures.  >>

<< Like our left and right hands, the shape of two mirrored cage structures cannot be superimposed. Since the 19th century, academics have characterized this type of object symmetry as 'chiral,' from the ancient Greek meaning 'hand.' These kinds of molecules are frequently found in natural compounds. Chirality influences interactions of polarized light and magnetic properties and plays a vital role in life.  For example, our olfactory receptors react very differently to the two mirror images of the limonene molecule: one smells like lemon, the other like pine. This so-called chiral recognition is a process that can determine whether a molecule acts as medicine or poison. >>

Complex, porous, chiral nano-patterns arise from a simple linear building blocks. Technical University Munich. Jan 16, 2020.

https://m.phys.org/news/2020-01-complex-porous-chiral-nano-patterns-simple.html

<< Regrettably (in this specific experimental context), the end groups proved to be elusive >>

Chao Jing,  Bodong Zhang, et al. Snapshots of Dynamic Adaptation: Two‐Dimensional Molecular Architectonics with Linear Bis‐Hydroxamic Acid Modules. Angewandte Chemie International Edition. Volume 58, Issue 52. doi: 10.1002/anie.201912247. Oct 31, 2019. 

https://onlinelibrary.wiley.com/doi/full/10.1002/anie.201912247

Also

keyword 'chiral' in FonT

https://flashontrack.blogspot.com/search?q=chiral

# bots: xenobot (from Xenopus laevis), the first living, programmable organism

<< A remarkable combination of artificial intelligence (AI) and biology has produced the world’s first "living robots".  (..) The term "xeno" comes from the frog cells (Xenopus laevis) used to make them. >>

<< One of the researchers described the creation as "neither a traditional robot nor a known species of animal", but a "new class of artifact: a living, programmable organism". >>

<< Xenobots are less than 1mm long and made of 500-1000 living cells. They have various simple shapes, including some with squat "legs". They can propel themselves in linear or circular directions, join together to act collectively, and move small objects. Using their own cellular energy, they can live up to 10 days. >>

Simon Coghlan, Kobi Leins. Not bot, not beast: scientists create first ever living, programmable organism. University of Melbourne. Jan 19, 2020.

https://theconversation.com/not-bot-not-beast-scientists-create-first-ever-living-programmable-organism-129980

Sam Kriegman, Douglas Blackiston, et al. A scalable pipeline for designing reconfigurable organisms. PNAS. doi: 10.1073/pnas.1910837117.  Jan 13, 2020

https://www.pnas.org/content/early/2020/01/07/1910837117

Also

keyword 'bots' in FonT

https://flashontrack.blogspot.com/search?q=bots

# behav: walking with turning

<< Normal human locomotion in daily life involves walking with turning, not just straight line walking. (..) the metabolic rate while walking in circles increases with decreasing radius for fixed speed. (..) this increase in energy cost for turning has behavioral implications >>

<< to save energy, (..) humans should walk slower in smaller circles, slow down when path curvature increases when traveling along more complex curves, turn in place around a particular optimal angular speed, and avoid sharp turns but use smooth gentle turns while navigating around obstacles or while needing to turn while walking. >>

Geoffrey L. Brown, Nidhi Seethapathi, Manoj Srinivasan. Walking with turning: energy optimality explains walking behavior while turning and path planning. arXiv: 2001.02287v1 [q-bio.NC]. Jan 7, 2020.

https://arxiv.org/abs/2001.02287

# gst: irregular sampling design to address behaviours

<< Animal movement studies have become ubiquitous in animal ecology for the estimation of space use and the analysis of movement behavior. In these studies, animal movement data are primarily collected at regular time intervals. (AA) propose an irregular sampling design that could lead to greater efficiency and information gain in animal movement studies. (The) novel sampling design, called lattice and random intermediate point (LARI), combines samples at regular and random time intervals. >>

<<  in each of the data and simulation examples explored in this paper, LARI sampling results in more accurate and precise parameter estimation and, thus, better prediction of missing data as well.  >>

Elizabeth Eisenhauer,  Ephraim Hanks. A lattice and random intermediate point sampling design for animal movement. Environmetrics. doi: 10.1002/env.2618. Jan 3, 2020.

https://onlinelibrary.wiley.com/doi/abs/10.1002/env.2618

Gail McCormick. Including irregular time intervals improves animal movement studies. Pennsylvania State University. Jan 15, 2020.

https://m.phys.org/news/2020-01-irregular-intervals-animal-movement.html

Also

keyword "pause" in Notes

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keyword "pause" in FonT

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