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MAGNETIC SHIELDING AND CAMBRIAN EXPLOSION. “The Phanerozoic has been the era of plate tectonics. Lithosphere motions documented by paleomagnetism suggest Earth’s dipole magnetic field may have developed at ~600 Ma. The Cambrian explosion in which most modern phyla evolved may have required its shielding against radiation.” https://lnkd.in/d8AxQ-kU View in LinkedIn

ORIGIN OF MAGNETIC SHIELD. “Earth's internal strong dipolar magnetic field may have developed in its present form only about 600 m.y. ago after a long hiatus without such a field or with one that was much weaker or more complicated.” https://www.sciencedirect.com/science/article/pii/S0012825219302636?via=ihub View in LinkedIn

FRAGMENT FROM NATURE features the work of the geologist, the late Professor Warren Hamilton, who undertook a new and radical explanation for the Cambrian explosion some 600 million years ago, in an attempt to overturn dogmatic ideas prevalent at the time. The Cambrian explosion has always lacked a convincing story and this may be a compelling part of it, combined with global flooding wiping the older fossil record clean. View in LinkedIn

Hubble Revisits the Veil Nebula https://lnkd.in/dAAK_yED View in LinkedIn

Pin mold on dog scat time again in wet conditions. See interesting, but dated, video on the mold. " " https://lnkd.in/dHPnaYUi View in LinkedIn

Midnight chimes on New Year’s eve on the steps of the imposing Girona cathedral, and crowds repeat what has been a 2,000 year old tradition. View in LinkedIn

THE DOMINANT PLANT SPECIES. “It has become traditional to open a discussion of angiosperm origins by quoting Charles Darwin who described the problem as an abominable mystery. But what is so mysterious and so abominable about angiosperm origins is that, after 140 years of research and profuse publication, there still is no light at the end of the tunnel?” https://lnkd.in/dq9cE6j2 View in LinkedIn

EO Wilson. “Ants are possibly as close as we will ever see to what higher social organization might look like on another planet. They communicate almost entirely by smell and taste. They have extremely complicated societies.” https://youtu.be/RcGeewpiCr4 View in LinkedIn

PATCHY DATA. “The database of geomagnetic paleopoles thought to be of Precambrian age is ambiguous and undersampled. Age of magnetization is the most critical and least known parameter and only selectivity of data has enabled consistency with popular conclusions.” https://www.sciencedirect.com/science/article/pii/S0012825219302636?via=ihub View in LinkedIn

TECTONIC SUPERCONTINENTS. “Illustrations have been devised of analogous plate-tectonic activity in the form of disruption and reassembly of hypothetical successive but similar Precambrian supercontinents Columbia and Rodinia.” https://www.sciencedirect.com/science/article/pii/S0012825219302636?via=ihub View in LinkedIn