* Astronomy

Members Login
Post Info TOPIC: Ancient life


L

Posts: 129963
Date:
RE: Ancient life
Permalink  
 


Just how old are animals?

The origin of animals was one of the most important events in the history of Earth. Beautifully preserved fossil embryos suggest that our oldest ancestors might have existed a little more than half a billion years ago.
However, using a recently developed relaxed molecular clock methods called RelTime a team of scientists at Oakland (Michigan) and Temple (Philadelphia) dated the origin of animals at approximately 1.2 billion years ago reviving the debate on the age of the animals.

Read more



__________________


L

Posts: 129963
Date:
Permalink  
 

Early life on land may have thrived in 3.5 billion-year-old Pilbara hot spring

A team of researchers discovered evidence of fossil stromatolites - structures formed by layers of cyanobacteria - in what appears to be an ancient freshwater hot spring.
They said the discovery, reported today in the journal Nature Communications, supports the emerging theory life may have evolved in land-based hot springs rather than in deep sea hydrothermal vents, and provides a new target in the search for ancient life on Mars.

Read more



__________________


L

Posts: 129963
Date:
Weng'an Biota
Permalink  
 


Research sheds new light on 'world's oldest animal fossils'

A team of researchers, led by the University of Bristol, has uncovered that ancient fossils, thought to be some of the world's earliest examples of animal remains, could in fact belong to other groups such as algae.
The Weng'an Biota is a fossil Konservat-Lagerstätte in South China that is around 600 million-years-old and provides an unparalleled snapshot of marine life during the interval in which molecular clocks estimate that animal groups had evolved.

Read more



__________________


L

Posts: 129963
Date:
RE: Ancient life
Permalink  
 


Fossilised filaments from hot ocean vent claimed to be earliest evidence of life on Earth

Tiny mineralised filaments smaller than a human hair found in rocks more than 3.77 billion years old may be evidence of one of the oldest lifeforms on Earth.
An international team of scientists has discovered what they believe are the fossilised remains of microorganisms that would have clustered around a hot, seafloor vent.
They said the discovery, published today in Nature, complements other evidence of early life found last year in 3.71-billion-year-old fossil stromatolites in Greenland.

Read more



__________________


L

Posts: 129963
Date:
Earliest living organisms
Permalink  
 


Earliest evidence of life on Earth 'found'

Scientists have discovered what they say could be fossils of some of the earliest living organisms on Earth.
They are represented by tiny filaments, knobs and tubes in Canadian rocks dated to be up to 4.28 billion years old.
That is a time not long after the planet's formation and hundreds of millions of years before what is currently accepted as evidence for the most ancient life yet found on Earth.

Read more



__________________


L

Posts: 129963
Date:
RE: Ancient life
Permalink  
 


World's oldest fossils unearthed

Remains of microorganisms at least 3,770 million years old have been discovered by an international team led by UCL scientists, providing direct evidence of one of the oldest life forms on Earth.
Read more



__________________


L

Posts: 129963
Date:
Permalink  
 

World's oldest fossils unearthed

Remains of microorganisms at least 3,770 million years old have been discovered - providing direct evidence of one of the oldest life forms on Earth.
An international research team has found tiny filaments and tubes formed by bacteria encased in quartz layers, which contain some of the oldest sedimentary rocks known on Earth.

Read more



__________________


L

Posts: 129963
Date:
Websteroprion armstrongi
Permalink  
 


400 million year old gigantic extinct monster worm discovered in Canadian museum

Researchers from the University of Bristol, Lund University in Sweden and the Royal Ontario Museum studied an ancient fossil, which has been stored at the museum since the mid-1990s, and discovered the remains of a giant extinct bristle worm (the marine relatives of earthworms and leeches).
Sample materials, from what proved to belong to the Devonian Kwataboahegan Formation, were brought back to the Royal Ontario Museum, where they have been stored until they caught the eyes of the authors'.
The species has been named Websteroprion armstrongi. This honours Armstrong, who collected the material, and bass player extraordinaire, Alex Webster of Death Metal band Cannibal Corpse, since he can be regarded as a 'giant' when it comes to handling his instrument.

Read more



__________________


L

Posts: 129963
Date:
RE: Ancient life
Permalink  
 


Ancient Rocks Give a Glimpse Into Life Before Oxygen

Somewhere between Earth's creation and where we are today, scientists have demonstrated that some early life forms existed just fine without any oxygen.
While researchers proclaim the first half of our 4.5 billion-year-old planet's life as an important time for the development and evolution of early bacteria, evidence for these life forms remains sparse including how they survived at a time when oxygen levels in the atmosphere were less than one-thousandth of one percent of what they are today.

Read more



__________________


L

Posts: 129963
Date:
Permalink  
 

New Bacteria Groups, and Stunning Diversity, Discovered Underground

One of the most detailed genomic studies of any ecosystem to date has revealed an underground world of stunning microbial diversity, and added dozens of new branches to the tree of life.
Read more



__________________
1 2 321  >  Last»  | Page of 21  sorted by
Quick Reply

Please log in to post quick replies.



Create your own FREE Forum
Report Abuse
Powered by ActiveBoard