[ ]      [ ]   [ ]

Back To The 50's - rhahl - May 29, 2016 - 6:14am
 
Cryptic Posts - Leave Them Guessing - Skydog - May 29, 2016 - 6:10am
 
Back to Last Tuesday - Coaxial - May 29, 2016 - 6:10am
 
The Prince topic - Skydog - May 29, 2016 - 6:04am
 
Country Up The Bumpkin - Skydog - May 29, 2016 - 5:57am
 
What did you have for lunch? - Skydog - May 29, 2016 - 5:47am
 
Baseball, anyone? - Skydog - May 29, 2016 - 5:42am
 
Beer - olivertwist - May 29, 2016 - 5:28am
 
Using the cache on an Android Phone - patomarc - May 29, 2016 - 4:26am
 
Turkey - Kaw - May 29, 2016 - 3:35am
 
Live Music - rhahl - May 29, 2016 - 2:39am
 
Back to the 00's - rhahl - May 29, 2016 - 2:07am
 
BACK TO THE 80's - R_P - May 29, 2016 - 1:33am
 
The war on Funk (is over!). - rhahl - May 29, 2016 - 12:44am
 
Radio Paradise Comments - Alexandra - May 28, 2016 - 10:03pm
 
Trump - Rod - May 28, 2016 - 7:55pm
 
Mixtape Culture Club - Lazy8 - May 28, 2016 - 7:25pm
 
What Makes You Laugh? - Coaxial - May 28, 2016 - 6:35pm
 
Back to the 70's - R_P - May 28, 2016 - 6:30pm
 
Celebrity Face Recognition - DaveInVA - May 28, 2016 - 5:11pm
 
RP3 Beta Player - BillG - May 28, 2016 - 3:34pm
 
Climate Change - R_P - May 28, 2016 - 1:21pm
 
What makes you smile? - Skydog - May 28, 2016 - 7:51am
 
The End of Europe - rotekz - May 28, 2016 - 6:29am
 
Post your underwear - BlueHeronDruid - May 27, 2016 - 11:57pm
 
Back to the 90's - R_P - May 27, 2016 - 10:19pm
 
Australia has Disappeared - R_P - May 27, 2016 - 7:18pm
 
Tech & Science - R_P - May 27, 2016 - 7:12pm
 
Would you drive this car for dating with ur girl? - DaveInVA - May 27, 2016 - 6:26pm
 
Back to back - haresfur - May 27, 2016 - 5:37pm
 
RIP Ray Charles - oldviolin - May 27, 2016 - 5:30pm
 
Last gas price paid? - islander - May 27, 2016 - 5:28pm
 
YouTube: Music-Videos - rhahl - May 27, 2016 - 5:18pm
 
RP Daily Trivia Challenge - KurtfromLaQuinta - May 27, 2016 - 4:55pm
 
Back to the 60's - Skydog - May 27, 2016 - 4:32pm
 
Back to the 40's - R_P - May 27, 2016 - 3:49pm
 
Unindicted felon: candidate Hillary Clinton - rotekz - May 27, 2016 - 3:45pm
 
Back To 1969 - buddy - May 27, 2016 - 2:47pm
 
Guns - westslope - May 27, 2016 - 2:22pm
 
Regarding the whole artist royalty fee thing - westslope - May 27, 2016 - 2:10pm
 
Maps • Google • GeoGuessr - ScottFromWyoming - May 27, 2016 - 1:55pm
 
This is Odd, Gross and a good excuse to be late for work - miamizsun - May 27, 2016 - 1:12pm
 
Dialing 1-800-Manbird - aflanigan - May 27, 2016 - 12:10pm
 
Name My Band - buzz - May 27, 2016 - 11:03am
 
Oklahoma Questions and Points of Interest - sunybuny - May 27, 2016 - 10:52am
 
Photos you have taken of your walks or hikes. - KurtfromLaQuinta - May 27, 2016 - 10:44am
 
9/11 - mrtuba9 - May 27, 2016 - 9:52am
 
The Image Post - trekhead - May 27, 2016 - 9:51am
 
Random Solutions - Random Advice - Proclivities - May 27, 2016 - 9:31am
 
Things You Thought Today - oldviolin - May 27, 2016 - 9:27am
 
Background for a quiet dinner party - Proclivities - May 27, 2016 - 9:25am
 
kurtster's ear candy emporium - miamizsun - May 27, 2016 - 8:21am
 
Counting with Pictures - ZM_Herb - May 27, 2016 - 6:48am
 
What Are You Going To Do Today? - miamizsun - May 27, 2016 - 5:17am
 
HALF A WORLD - miamizsun - May 27, 2016 - 5:14am
 
• • •  What's For Dinner ? • • •  - Skydog - May 27, 2016 - 4:06am
 
2016 Elections - rotekz - May 27, 2016 - 12:14am
 
The Secret - oldviolin - May 26, 2016 - 6:18pm
 
Animal Resistance - haresfur - May 26, 2016 - 4:17pm
 
Pernicious Pious Proclivities Particularized Prodigiously - R_P - May 26, 2016 - 4:15pm
 
Birthday wishes - triskele - May 26, 2016 - 3:53pm
 
song about an arsonist - haresfur - May 26, 2016 - 3:19pm
 
Make me a stereo system! (poof!!) - DaveInVA - May 26, 2016 - 2:44pm
 
What are you listening to now? - Steely_D - May 26, 2016 - 1:42pm
 
You might be getting old if...... - Prodigal_SOB - May 26, 2016 - 11:44am
 
I don't think they know what that word means... - Proclivities - May 26, 2016 - 10:45am
 
What Did You Do Today? - DaveInVA - May 26, 2016 - 8:49am
 
Game of Thrones - buddy - May 26, 2016 - 8:36am
 
Grammar Police Rap Sheet - ptooey - May 26, 2016 - 6:42am
 
Idiocracy - miamizsun - May 26, 2016 - 6:06am
 
Positive Thoughts and Prayer Requests - miamizsun - May 26, 2016 - 4:10am
 
France - oldjack - May 26, 2016 - 2:44am
 
Celebrity Deaths - kurtster - May 25, 2016 - 8:45pm
 
Celebrity News - olivertwist - May 25, 2016 - 7:18pm
 
• • • Fake Beard with Some Sausages • • • - Beaker - May 25, 2016 - 4:29pm
 
Index » Regional/Local » USA/Canada » Evolution! Page: 1, 2, 3 ... 116, 117, 118  Next
Post to this Topic
R_P
Ni dieu ni maître
R_P Avatar



Posted: May 18, 2016 - 5:26am

Complex life a billion years earlier than thought?
Organic fragments extracted from the host rock of the Gaoyuzhuang macroscopic fossils showing well-preserved cellular structure. Credit: Maoyan Zhu.
Researchers said Tuesday they had uncovered fossils showing that complex life on Earth began more than 1.5 billion years ago, nearly a billion years earlier than previously thought.

But the evidence, published in Nature Communications, immediately provoked debate, with some scientists hailing it as rock solid, and others saying they were wholly unconvinced.

After first emerging from the primordial soup, life remained primitive and unicellular for billions of years, but some of those cells eventually congregated like clones in a colony.

Scientists even took to calling the later part of this period the "boring billion", because evolution seemed to have stalled.

But at some point there was another huge leap—arguably second in importance only to the appearance of life itself—towards complex organisms.

This transition progressively gave rise to all the plants and animals that have ever existed.

Exactly when multi-cell eukaryotes—organisms in which differentiated cells each contain a membrane-bound nucleus with genetic material—showed up has inflamed scientific passions for many decades.

The new study is sure to enrich that tradition.

"Our discovery pushes back nearly one billion years the appearance of macroscopic, multicellular eukaryotes compared to previous research," Maoyan Zhu, a professor at the Nanjing Institute of Geology and Palaeontology, told AFP.

The fossils were uncovered in Hebei Province's Yanshan region, where Mao Zedong and his communist army hunkered down during World War II before coming to power.

Zhu and colleagues found 167 measurable fossils, a third of them in one of four regular shapes—an indication of complexity. (...)

R_P
Ni dieu ni maître
R_P Avatar



Posted: May 6, 2016 - 8:04pm

Fossil Hunters Uncover 71-Million-Year-Old Trove in Antarctica
After a plane flight, boat ride, helicopter lift and a lot of hiking, the scientists returned with a massive cache of fossils


R_P
Ni dieu ni maître
R_P Avatar



Posted: May 4, 2016 - 1:15am

Endangered venomous mammal predates dinosaurs' extinction, study confirms
Researchers have sequenced the mitochondrial genome of the endangered solenodon, a venomous insectivore that diverged from other living mammals 78 million years ago.

R_P
Ni dieu ni maître
R_P Avatar



Posted: Apr 9, 2016 - 7:34pm

In Science, It’s Never ‘Just a Theory’

R_P
Ni dieu ni maître
R_P Avatar



Posted: Mar 28, 2016 - 4:15pm

Top 10 Design Flaws in the Human Body
From our knees to our eyeballs, our bodies are full of hack solutions.
R_P
Ni dieu ni maître
R_P Avatar



Posted: Mar 17, 2016 - 3:49pm


Red_Dragon
y ddraig goch ddyry gychwyn
Red_Dragon Avatar

Location: Rethuglican Jesusland


Posted: Mar 16, 2016 - 4:07pm

 R_P wrote:


 
I sincerely hope so.
R_P
Ni dieu ni maître
R_P Avatar



Posted: Mar 16, 2016 - 4:06pm


R_P
Ni dieu ni maître
R_P Avatar



Posted: Mar 14, 2016 - 3:43pm

Small, brainy tyrannosaur sheds light on how T. rex evolved
Horse-sized Timurlengia euotica lacked massive, bone-snapping teeth, but was agile, with good hearing

R_P
Ni dieu ni maître
R_P Avatar



Posted: Feb 17, 2016 - 5:40am

What Sparked the Cambrian Explosion?
An evolutionary burst 540 million years ago filled the seas with an astonishing diversity of animals. The trigger behind that revolution is finally coming into focus

R_P
Ni dieu ni maître
R_P Avatar



Posted: Feb 15, 2016 - 3:42pm

Mystery 'hobbits' not humans like us: study

Diminutive humans that died out on an Indonesian island some 15,000 years ago were not Homo sapiens but a different species, according to a study published Monday that dives into a fierce anthropological debate.

Fossils of Homo floresiensis—dubbed "the hobbits" due to their tiny stature—were discovered on the island of Flores in 2003.

Controversy has raged ever since as to whether they are an unknown branch of early humans or specimens of modern man deformed by disease.

The new study, based on an analysis of the skull bones, shows once and for all that the pint-sized people were not Homo sapiens, according to the researchers.

Until now, academic studies have pointing in one direction or another—and scientific discourse has sometimes tipped over into acrimony.

One school of thought holds that so-called Flores Man descended from the larger Homo erectus and became smaller over hundreds of generations.

The proposed process for this is called "insular dwarfing"—animals, after migrating across land bridges during periods of low sea level, wind up marooned on islands as oceans rise and their size progressively diminishes if the supply of food declines.

An adult hobbit stood a metre (three feet) tall, and weighed about 25 kilos (55 pounds).

Similarly, Flores Island was also home to a miniature race of extinct, elephant-like creatures called Stegodon.

But other researchers argue that H. floresiensis was in fact a modern human whose tiny size and small brain—no bigger than a grapefruit—was caused by a genetic disorder.

One suspect was dwarf cretinism, sometimes brought on by a lack of iodine. Another potential culprit was microcephaly, which shrivels not just the brain and its boney envelope.

Weighing in with a new approach, published in the Journal of Human Evolution, a pair of scientists in France used high-tech tools to re-examine the layers of the "hobbit" skull. (...)

R_P
Ni dieu ni maître
R_P Avatar



Posted: Feb 8, 2016 - 1:35pm

Human evolution is more a muddy delta than a branching tree

R_P
Ni dieu ni maître
R_P Avatar



Posted: Jan 15, 2016 - 5:00am

Grisly find suggests humans inhabited Arctic 45,000 years ago | Science | AAAS
To hunt mammoths in the Arctic, humans had to have the hunting tools, insulated clothes and shelter to survive in the Arctic.
Genetic data does not support ancient trans-Atlantic migration
R_P
Ni dieu ni maître
R_P Avatar



Posted: Jan 10, 2016 - 7:19am

Gene tweak led to humans’ big toe | Science News
Decrease in bone-building protein helped enable upright walking
TRUE BLUE The blue coloring in this mouse embryo shows that a genetic switch that controls production of a bone- and tissue-building protein turns on genes in the lower half of the embryo’s body.
Proclivities
Nothing is fool-proof to a moderately proficient fool.
Proclivities Avatar

Location: Paris of the Piedmont
Gender: Male
Zodiac: Aries
Chinese Yr: Tiger


Posted: Nov 4, 2015 - 9:34am


R_P
Ni dieu ni maître
R_P Avatar



Posted: Sep 20, 2015 - 5:08pm

'Tree of life' for 2.3 million species released
Large, open-access resource aims to be 'Wikipedia' for evolutionary history

::
R_P
Ni dieu ni maître
R_P Avatar



Posted: Sep 19, 2015 - 3:03pm

Is Homo naledi just a primitive version of Homo erectus? · John Hawks

R_P
Ni dieu ni maître
R_P Avatar



Posted: Sep 15, 2015 - 10:01pm

Humans aren’t so special after all: The fuzzy evolutionary boundaries of Homo sapiens
Recent discoveries point to shared traits and blurred borders with our closest relatives.
::
R_P
Ni dieu ni maître
R_P Avatar



Posted: Sep 12, 2015 - 12:16pm

::
R_P
Ni dieu ni maître
R_P Avatar



Posted: Sep 10, 2015 - 5:24pm

Explorer Lee Berger on Finding New Human Species, Homo Naledi

Page: 1, 2, 3 ... 116, 117, 118  Next