Menu
Science blog
Map of the universe years in the making
Rogue bug may cause IVF failure
Technology decodes Alhambra inscriptions
Sonar causes deafness in dolphins
GM stem cells treat autoimmune disease
Nickel crash kick-started evolution
GPS inhalers track asthma triggers
Urban design turning kids off being active
Cleaning up oil spills can be bad for fish
Fluoro sensors to monitor recycled water
First cloned camel born in Dubai
Cephalopods share common toxic armoury
New evidence of aspirin risk for elderly
Salmonella vaccine could come from space
Porpoise-like sub swims with the current
Microbes thrive on iron under the ice
Blinking tower lights could save birds
Tradition can curb climate change: meeting
Coolest brown dwarf in universe found
'Silent' heart attacks quite common: study
World's land slipping in quality
Warning over 'natural' menopause therapies
Complex life pushed back in time
Lice may suppress asthma, allergies
  Complex life pushed back in time
Multicellular organisms existed on earth more than 400 million years earlier than previously thought, an international team of geologists has revealed.

The finding, published today in the Proceedings of the National Academy of Science, comes out of research aimed at ending controversy over the age of the Vindhyan basin in central India.

The controversy concerns two fossil discoveries in 1998, which gave conflicting views over when the Vindhyan sedimentary basins, which spread over more than 100,000 square kilometres of central India, were formed.

At the time, Indian geologist Dr Rafat Azmi reported finding small, shell-like fossils, which were typical of those that date to the Cambrian era about 500 to 600 million years ago.

However, German researcher, Dr Adolf Seilacher, discovered a network of mini-tunnels that he claimed were the trace fossils of complex, worm-like organisms estimated to be about 1.2 billion years old.

In today's paper, the authors, who include Australian researcher Professor Birger Rasmussen, say the discrepancy in the two reports had "profound implications" for geological dating and needed to be resolved.

They say that errors, which were later discovered in Azmi's reports, "were taken to suggest they were fundamentally flawed and that the skeletal fossils did not exist".
Fossils confirmed

However, in today's report the authors say Azmi's fossils are real, and are more than a billion years older than he claimed.

The discovery is important as it gives new insight into the earth's biosphere in the Palaeoprotorezoic era, 1.6 billion years ago.

Rasmussen, of Curtin University in Perth, says the size of the fossil tubes is consistent with them being the traces of multicellular eukaryotic algae.

"Previously accepted multicellular eukaryotes were only known from the late Mesoproterozoic or early Neoproterozoic (some 400 to 600 million years later)," the team writes.

"Put simply it shows there were more complex organisms around earlier than we thought," Rasmussen says.

For the study, members of the team travelled with Azmi to collect specimens, which were then analysed in Sweden and Australia.

In Australia, Rasmussen dated the fossils by analysing the decay of uranium inside zircon crystals, while in Sweden they used electron radiation x-ray tomographic microscopy to date the microfossils.

Rasmussen says both methods found the "likely age of the Lower Vindhyan is from the end of the Palaeoproterozoic about 1700 and 1600 million years ago".

"The fact two difference dating methods gave consistent results is important," says Rasmussen.

He and his colleagues say the Lower Vindhyan "presents a spectacular preservation window into a Palaeoproterozoic biota".

"The Vindhyan deposits offer important new insights into the nature and diversity of life, and in particular, the early evolution of multicellular eukaryotes," they write.

Rasmussen says one of the main factors for this level of preservation may be because the region has not been subject to metamorphosis brought on by conditions such as intense heating.
Roads kill more than malaria: study
Seagrass link to seahorse upright posture
Black band disease hits Great Barrier Reef
Hobbit feet reignite debate
Lizards soak up sunshine vitamin
Canada sequences swine flu virus
Termites are a miner's best friend
'Hide and seek' costly to HIV
Giant trilobites had complex social lives
Midnight sun too much for some
More toxics added to 'dirty dozen' list
Rogue galaxies prompt rethink on Newton
Acupuncture relieves back pain: study
Blazars shed light on black hole physics
Unfaithful offspring get head start
Daydreamers might solve problems faster
Coal supply may be vastly overestimated
Science and unis are winners in the budget
Heartbeat key for blood growth in embryos
Neck pain worse for women in the office
Busty figurine a 'Paleolithic Playboy'
Plant cells help bees get a grip
Space trio to give sharper view of cosmos
Sea creatures inspire CO2 sponge
Genetic link between period onset and BMI
Researchers find bacteria in clouds
Sustainable farm research 'under threat'
Tree leaves monitor pollution levels
Menu
Stay upright during labour, say experts
Antarctic ice growth linked to ozone hole
Fires fuelling global warming: study
Methane climate shock 'less likely'
Genome map reveals cow's genetic makeup
Microbe bubble machine stores energy
Stress gives reef fish wonky ears
Swine flu remains a mystery
Perception is in the ear of the beholder
Solar wind gives asteroids a tanning
Researchers find grain's memory gene
PET bottles potential health hazard
Researchers find first common autism gene
Fossil fuel use must fall to 25%: study
'WaveRider' poised for hypersonic flight
Big cuttlefish 'at risk' from desalination
Glaciers show north-south climate divide
Mobile phones help cardiac rehab
Dancing birds feel the beat
Mushrooms may yield vitamin D bonanza
Dingoes may be a native's best friend
Dud treatments more easily spread
U2 comet dust predates solar system
Australian CO2 delay sends 'mixed message'
Visit Statistics
http://google.com/

http://bing.com/

https://gepatit-info.top/

https://serdechnic.com/

https://buy-meds24.com/

https://dverirespekt.ru/

https://www.sribno.net/

https://undergroundcityphoto.com/

https://detskiezabolevaniya.com/

http://grafaman.ru/

http://innoslicon.com/html/product/index.htm

https://yginekologa.com/

https://yes-com.com/

https://www.baikaleminer.com/

https://bitmaein.com/shop

https://www.artdeko.info/

https://aerodizain.com/

http://xn--d1abj0abs9d.in.ua/

http://lider82.ru/

http://sta-grand.ru/

http://snabs.kz/

https://sky-mine.ru/

https://rybalka-opt.ru/

http://snegozaderzhatel.ru/

https://xn--e1aaajzchnkg.ru.com/

http://hit-kino.ru/

http://www.regionshop.biz/

https://xn--80aaafbn2bc2ahdfrfkln6l.xn--p1ai/

https://pp-budpostach.com.ua/

https://vykup-avto-krasnodar.ru/

https://gcup.ru/

https://mega-polis.biz.ua/

http://vanrise.com.ua/

http://infra-e.ru/