Category: Uncategorized

COSMIC STRUCTURES. “Perturbations on scales smaller than galaxy clusters are erased, and structure formation is ‘top down’: large objects form first.” https://lnkd.in/e6ifiQMn View in LinkedIn

DARK MATTER. “The nature of DM affects the evolution of the density perturbations. Cold dark matter (CDM) decouples when non-relativistic, and has very small velocity dispersion today. Hot dark matter (HDM) decouples when relativistic and has non-zero velocity dispersion today.” Thus dark matter is closely interconnected to gravity. https://lnkd.in/e6ifiQMn View in LinkedIn

GRAVITY-CENTRIC. “Structures (galaxies, galaxy clusters) form via gravitational instability: small initial over-densities grow due to gravity. How the perturbations grow, and hence how galaxies cluster, depends on the contents of the Universe.” https://lnkd.in/e6ifiQMn View in LinkedIn

This Hubble picture could easily be an exotic imaginary mountain landscape. https://lnkd.in/eSwH5GEm View in LinkedIn

PEAK EXPERIENCES. “Awe is a lightning bolt that marks in memory those moments when the doors of perception are cleansed and we see with startling clarity what is truly important in life. Moments of awe may be the most important, transformative experiences of life.” (Page 35) https://lnkd.in/eTQYza-q View in LinkedIn

SO ENDS this first of two weekends focusing on a new physiological explanation for the demise of the dinosaurs following a meteor(s) impaction. We all understand the catastrophic physical causes of extinction, but that could not account for the majority of the dieouts. That there was a metabolic consequence of large SO2 dust clouds is a credible, testable and novel idea in a field rather replete with rather pedestrian explanations. https://lnkd.in/eqAYpQg2 View in LinkedIn

CORRELATIONS. “The K/Pg ejecta layer is the only global stratigraphic marker in the geological record, allowing correlation of events worldwide. In the last 20 years much has been learned about the Chicxulub crater and the K/Pg boundary; however what is perhaps most interesting are the questions remaining, which include fundamental aspects of Chicxulub impact and its environmental effects.” https://lnkd.in/eqAYpQg2 View in LinkedIn

DISTANT ENERGY WAVE. “Energy release results in intense fracturing and deformation at the target site, generating seismic waves traveling the whole Earth.” https://lnkd.in/eqAYpQg2 View in LinkedIn

“MICROLENSING occurs when the angular separation of images is too small to be resolved (∼ micro arc second) and instead the source is temporarily brightened. Microlensing is a particularly powerful technique for probing compact DM, for instance Primordial Black Holes.” (DM = dark matter), https://lnkd.in/e6ifiQMn View in LinkedIn

NEW. My new virtual sculpture gallery. Nigelfleming.com http://Nigelfleming.com View in LinkedIn