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Omar Loisel
53,098 followers -
Amateur astronomy, cosmology, astrophysics and physics in general, music, film, photography, painting, sports and many other things - Amateur d'astronomie, de cosmologie, d'astrophysique et de physique en général, de musique, de cinéma, de photo, de peinture, de sport ainsi que de beaucoup d'autres choses
Amateur astronomy, cosmology, astrophysics and physics in general, music, film, photography, painting, sports and many other things - Amateur d'astronomie, de cosmologie, d'astrophysique et de physique en général, de musique, de cinéma, de photo, de peinture, de sport ainsi que de beaucoup d'autres choses

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Ask Ethan: Could The Fabric Of Spacetime Be Defective? (Synopsis)

So, you’d like to ruin the fabric of your space, would you? Similar to tying a knot in it, stitching it up with some poorly-run shenanigans, running a two-dimensional membrane through it (like a hole in a sponge), etc., it’s possible to put a topological defect in the fabric of space itself. This isn’t just a mathematical possibility, but a physical one: if you break a symmetry in just the right way, monopoles, strings, domain walls, or textures could be produced on a cosmic scale

Read more : http://scienceblogs.com/startswithabang/2017/07/22/ask-ethan-could-the-fabric-of-spacetime-be-defective-synopsis/

The differences between a Universe created according to standard cosmology (L) and one with a significant network of topological defects (R) give vastly different large-scale structures. We have good enough observations to rule out cosmic strings and domain walls as being a dominant component of the modern Universe. Image credit: Andrey Kravtsov (cosmological simulation, L); B. Allen & E.P. Shellard (simulation in a cosmic string Universe, R).
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In saliva, clues to a 'ghost' species of ancient human

In saliva, scientists have found hints that a "ghost" species of archaic humans may have contributed genetic material to ancestors of people living in Sub-Saharan Africa today.

Read more : https://phys.org/news/2017-07-saliva-clues-ghost-species-ancient.amp

In saliva, scientists have found hints that a "ghost" species of archaic human may have contributed genetic material to ancestors of people living in Sub-Saharan Africa today. The finding comes from a University at Buffalo-led research project that examined the evolutionary history of MUC7, a gene that codes for an important salivary protein of the same name. Credit: Bob Wilder/University at Buffalo.
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Quelques éléments en 6 points suite aux propos mensongers d’Emmanuel Macron sur l’anti-sionisme et revenant sur la participation le 16 juillet dernier de Netanyahou à la 75ème commémoration de la rafle du Vel d’Hiv.

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Ces « camps de terroristes » mi-propagande, mi-fantaisie morbide, procurent aux touristes une chance de jouer le rôle de soldats des forces d’occupation israéliennes dans des situations dramatiques.

Et pendant ce temps Macron s'agenouille devant les sionistes...

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Variables and more are going to be native in CSS soon! – CSS4

Read more : http://www.improgrammer.net/variables-going-native-css-soon-css4/

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Fossil site shows impact of early Jurassic's low oxygen oceans

Using a combination of fossils and chemical markers, scientists have tracked how a period of globally low ocean-oxygen turned an Early Jurassic marine ecosystem into a stressed community inhabited by only a few species.

Read more : https://phys.org/news/2017-07-fossil-site-impact-early-jurassic.amp

The low oxygen environment affected the growth and number of bivalves, reducing their number and population. Credit: The University of Texas at Austin/Rowan Martindale
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Moon Express veut ramener de la roche lunaire sur Terre d’ici 2020 pour la revendre

L'entreprise privée Moon Express prévoit de ramener de la roche lunaire sur Terre d'ici 2020. Autant pour permettre son étude scientifique que pour la revendre aux personnes intéressées, qui devront toutefois disposer de sacrés fonds pour se l'offrir.

Plus d'info : http://www.numerama.com/sciences/275736-moon-express-veut-ramener-de-la-roche-lunaire-sur-dici-2020-pour-la-revendre.html/amp

Moon Express
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