Showing posts with label Charles Darwin. Show all posts
Showing posts with label Charles Darwin. Show all posts

Monday, September 4

Fossil Millions of Years Old


Graecopithecus freybergi lived 7.2 million years ago in the dust-laden savannah of the Athens Basin. Image credit: Velizar Simeonovski.


The origin of the hominines (African apes and humans) is among the most hotly debated topics in paleoanthropology.

The traditional view, ever since Charles Darwin, holds that hominines and hominins (humans and fossil relatives) originate in Africa, where the earliest hominins are found and where all living non-human hominines live.

More recently a European origin has been proposed, based on the analysis of Late Miocene apes from Europe and Central Anatolia.

Anadoluvius turkae attests to a lengthy history of hominines in Europe, with multiple species in the eastern Mediterranean known for at least 2.3 million years.

“Our findings further suggest that hominines not only evolved in western and central Europe but spent over 5 million years evolving there and spreading to the eastern Mediterranean before eventually dispersing into Africa, probably as a consequence of changing environments and diminishing forests,” said Professor David Begun, a paleontologist at the University of Toronto.

“The members of this radiation to which Anadoluvius turkae belongs are currently only identified in Europe and Anatolia.”  READ MORE...

Wednesday, November 17

Our Twisted Universe


A forgotten idea of Albert Einstein’s might just be the saviour of cosmology, plus the great man’s (vain) quest to undermine quantum weirdness and the question of why the universe looks “just right” for our existence.

Hello, and welcome to November’s Lost in Space-Time, the monthly physics newsletter that unpicks the fabric of the universe and attempts to stitch it back together in a slightly different way. To receive this free, monthly newsletter in your inbox, sign up here.

Einstein’s forgotten twisted universe
There’s a kind of inevitability about the fact that, if you write a regular newsletter about fundamental physics, you’ll regularly find yourself banging on about Albert Einstein. As much as it comes with the job, I also make no apology for it: he is a towering figure in the history of not just fundamental physics, but science generally.

A point that historians of science sometimes make about his most monumental achievement, the general theory of relativity, is that, pretty much uniquely, it was a theory that didn’t have to be. When you look at the origins of something like Charles Darwin’s theory of evolution by natural selection, for example – not to diminish his magisterial accomplishment in any way – you’ll find that other people had been scratching around similar ideas surrounding the origin and change of species for some time as a response to the burgeoning fossil record, among other discoveries.

Even Einstein’s special relativity, the precursor to general relativity that first introduced the idea of warping space and time, responded to a clear need (first distinctly identified with the advent of James Clerk Maxwell’s laws of electromagnetism in the 1860s) to explain why the speed of light appeared to be an absolute constant.  READ MORE...