(Roughly) Daily

“South America must have lain alongside Africa and formed a unified block which was split in two in the Cretaceous; the two parts must then have become increasingly separated over a period of millions of years like pieces of a cracked ice floe in water”*…

Earth, 600 million years ago. The Ediacaran Period; life is evolving in the sea, and multicellular life is just beginning to emerge.

From the good folks who brought you Dinosaur Pictures, a chance to watch continental drift at work– a marvelous interactive model of the earth that you can view from the present to 600 million years ago: Ancient Earth.

* Arthur Wegener

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As we marvel at the evolving reality of nature, we might marvel as well at the laws that govern it: it was on this date in 1686, the publication of Newton’s Principia (the Philosophiae Naturalis Principia Mathematicawas arranged in London at the Royal Society. The minutes of the meeting record that the astronomer Edmond Halley would “undertake the business of looking after it and printing it at his own charge.”

Title page of the first edition

source

 

Written by LW

June 2, 2018 at 1:01 am

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