Sergi Valverde🌍(under a blue sky)
@svalver
Complex Human. He/him.
Very excited to share our @Trends_Ecol_Evo review paper on #punctuated_evolution: a pattern of long-term stability interrupted by dramatic changes. A thread on the origins of rapid change, from large #extinctions to socio-technological #disruption.🌍🧬🛠 doi.org/10.1016/j.tree…
Why so many phylogenies or phylogeny-like or tree-like diagrams progress from top-down, even though stratigraphic record is organized bottom-up (from older to younger) in geology, paleontology as well as archeology? 🤔 Even trees grow the same way.
Ancient Greek helmets through the years
Cool study. Shows low dispersal of mammals across continents. Most are endemics. Significant in understanding the modern structure of the Bretskyan hierarchy from mammalian perspective. nsojournals.onlinelibrary.wiley.com/doi/epdf/10.10… cc: @niles_eldredge @svalver @PalaeoPhilo @BlaiVidiella @CoelhoPre
Looks here @svalver -- geological sections near you recorded the uninterrupted reign of dinosaurs before the K-Pg mass extinction! 👇
🚨Our new study: Tiny teeth, big story. During the last few 100,000s of years of the Cretaceous, before the asteroid hit, a great diversity of theropods was living near what is now Barcelona. Dinosaurs were strong, up until their tragic end! Our paper: doi.org/10.1016/j.cret…
Sergi Valverde @svalver seminar on punctuated evolution at the @i2sysbio explaining the research by his group and collaborators on fundamental questions in evolution, from biological and cultural to technological. Amazing research
Our new work: S. N. Dorogovtsev, P. L. Krapivsky, Deterministic simplicial complexes arxiv.org/abs/2507.07402 novel models, how the numbers of various simplexes grow, upper-degree distributions, Hodge Laplacian spectra, adjacency matrix spectra, etc.
Vrba famously contrasted ecologically conservative impalas (Aepycerotini) with much more diverse widlbebeest & co (Alcelaphini) in their diversification dynamics link.springer.com/chapter/10.100… . Apparently the contrast between their diversification is even higher sciencedirect.com/science/articl…
Happy to announce 2 positions (1 PhD, 1 Postdoc) at @i2sysbio Valencia, funded by @ERC_Research Consolidator Project CellWise. Our goal is to advance the predictability in synthetic biology for the engineering of cellular cognition More info cellwise.eu, please RT!
I think of “evolution” in any system as “the fate of transmissible information” often appending “in an economic context.” This definition embraces stasis 😊. Ideas and other cultural artefacts are transmitted through speech, writing etc etc etc.
Seminar in two days on two hierarchical evolution themes: Daniel Brooks: The Persistence of Levels of Organization in Biological Thought Andrej Spiridonov: The scaling picture of symbiosis and co-evolution: Bretskyan hierarchy of holobionts and geobiomes taxon-omics.com/news-events-bl…
I would say - probably there is no cantrast between philosophy vs other domains of knowledge with respect to puctuations and gradualism in development. From what I know all domains of knowledge develop in puctuated manner just the diversification of philosophy is bottom-heavy 1/2
Most sciences and arts developed gradually. There have always been masterpieces, but it was only from the 19th century onwards that great novels appeared in large numbers, and the heyday of painting came at the end of the 19th and beginning of the 20th century. Sciences…
It was a simple idea, oversimplification of the reality of biological evolution yet one of the most powerful insight-generating approach was born there. Ideas also have their phylogenies which can vary greatly in their shape and timing of punctuations and this should be explored!
🏆 Rosa Fernández, investigadora principal del #IBE_Barcelona, recoge el Premio Nacional de Investigación en la modalidad Ángeles Alvariño en un acto presidido por @CasaReal, con @DianaMorantR. #DescifrandoEvolución #ConservandoBiodiversidad 👉 shorturl.at/Mi1KX
Recuperant sensacions a la muntanya... envoltat d'amics increïbles. Projectes nous, sentiments profunds, llibertat...
I believe the correct term is "night crew science." (c) SFI 2000s-something. @ricard_sole
'Night science' is what you do when you're not sure what's the question.
"why don't scientists just publish negative findings" paper: biorxiv.org/content/10.110…
Not 0, not 1, but 2 great summer-like schools at @CRMatematica Barcelona! 1st @CompSysSoc Spanish Chapter CS3 Summer School, Sep 29-Oct 3 and XIII GEFENOL-@DIFENSC_RSEF School on StatPhys of Comples Systems Links below RT @Comsotec @omeuxeito @wetuad @svalver @rafaelprietoc 🙏
D’Orbigny, student of Georges Cuvier, was a spectacular field naturalist and geologist who seems to have lived rent -free in Darwin’s head while on the Beagle and on at least until the mid 1840s
Again, Bretskyan hierarchy of the planet modulates the complexity of life. This time -- the case of languages. CC: @svalver @niles_eldredge @PalaeoPhilo @CoelhoPre
Macroevolutionary analysis of polysynthesis shows that language complexity is more likely to evolve in small, isolated populations pnas.org/doi/abs/10.107…
He also recognized coherent punctuated changes in Earth's history, the basis for the concept of "étages géologiques" (geological "stages") -- the basic chronostratigraphical units of the International Chronostratigraphic Chart cc: @niles_eldredge @CoelhoPre @PalaeoPhilo @svalver
une 30, 1857, died #OTD, Alcide Dessalines d' Orbigny, French paleontologist and zoologist, pioneer of micropaleontology 🦠🔬 paleonerdish.wordpress.com/2015/04/27/alc…