Bookmark Kaumudi Online  Bookmark this site  Editor@Kaumudi  |  Marketing  Print Advt rates  |  Calendar 2012        Go!    
 
 
January 22, Sunday 2017 9:54 PM       

       HEADLINES: Black flags shown at Law Academy principal Lekshmi Nair                                              Two Keralites found dead in Oman                                              Politics for many is to make money, says Sreenivasan                                              Nivin Pauly indirectly supports jallikattu                                              Train derailment saddening: Modi                                              TN files caveat in SC to defend its ordinance on Jallikattu                                              Akhilesh releases SP poll manifesto; Mulayam, Shivpal Yadav give it a miss                                              Prabhu is earnest but govt neglecting railways: Mamata                                              Trump warns journalists, calls them most dishonest human beings                                              Four Qaeda members killed in Yemen drone strikes                                              Trump hotel starts 'inaugural tradition' amid ethics concern                                              Saina lifts Malaysia Masters Grand Prix Gold                                              Kaumudi Facebook
       SCI&TECH Next Article: Microsoft unveils Windows 8 for public test  
       'Humans evolved from a two-inch worm'
 
         Posted on :00:12:00 Mar 7, 2012
   
A A
       Last edited on:00:12:00 Mar 7, 2012
         Tags: Humans, two-inch worm
 

HUMANS have evolved from this two-inch worm, scientists claim. The extinct Pikaia gracilens lived in the sea more than 500million years ago. Now scientists have linked it to humans, saying that it is a primitive ancestor of animals with spinal cords.

It also gave rise to fish, birds, reptiles and other mammals.

Although Pikaia was first discovered in 1911, scientists assumed it was only related to leeches and earthworms.

But the spinal cord, paired with zig-zag patterened blocks of muscle tissue known as myomeres, relates it to humans.

Lead author Professor Simon Conway Morris, from Cambridge University, said: "The discovery of myomeres is the smoking gun that we have long been seeking.

"This study clearly places Pikaia as the planet's most primitive chordate.

"So, next time we put the family photograph on the mantle-piece, there in the background will be Pikaia."

Using cutting-edge microscopes and imagery techniques, scientists revealed fine details in the Pikaia fossils.

Every specimen of Pikaia discovered so far has come from the Burgess Shale fossil beds in Canada's Yoho National Park.
It is thought to have swum above the sea floor by bending its body from side to side.

Dr Jean-Bernard Caron, from the University of Toronto in Canada, took part in the research.

He said: "It's very humbling to know that swans, snakes, bears, zebras and, incredibly, humans all share a deep history with this tiny creature no longer than my thumb."

A A
       SCI&TECH
Next Article: Microsoft unveils Windows 8 for public test
 
 
SCI&TECH HEADLINES
Moon may have formed from collision of tiny 'moonlets'  
China to set up world's highest altitude telescopes in Tibet  
NASA to launch two robotic probes to study early solar system  
After Mars, ISRO eyes Venus and Jupiter  
New, rare galaxy spotted over 359 mln light-years away  
Coconut sized tumor removed from Iraqi woman's head  
Bacteria-powered battery built on single sheet of paper  
'Human-made objects on Earth amount to 30 trillion tonnes'  
Element 117 officially named 'Tennessine'  
Predatory bacteria may wipe out 'superbugs': study  
New potent vaccine may spell end for HIV  
Water exists deeper in Earth than thought: study  
Docs reconstruct tongue with flesh from thigh  
Why wounds take longer to heal with age decoded  
WhatsApp launches video calling to take on Google Duo, Skype  
Molecules on phone can unveil your lifestyle: study  
Chandrayaan-2 mission: ISRO conducts tests for Moon landing  
In rare surgery, 7kg tumour removed from woman's kidney  
NASA satellites break Guinness World Record  
Curiosity rover discovers rare 'Egg Rock' on Mars  
Male birth control shots may lower pregnancy odds: study  
Mysterious 'Higgs Bison' species identified  
Note 7 debacle may hit Samsung's India rev by Rs 6,500 cr: CMR  
America will take the giant leap to Mars by 2030s: Obama  
Global dust storm may hit Mars soon: NASA  
 
Azharuddin's nomination for HCA president's post was rejected. Do you agree to this?
Yes
 
No
 
Don't know
 
 
 
Home Kerala India World Business Sports Sci&Tech Education Automobile CityNews Movies Environment Letters 
© Copyright keralakaumudi Online 2011  |  Reproduction in whole or in part without written permission is prohibited.
Head Office Address: Kaumudi Buildings, Pettah P.O, Trivandrum - 695024, India.
Online queries talk to Deepu Sasidharan, + 91 98472 38959 or Email deepu[at]kaumudi.com
Customer Service -Advertisement Disclaimer Statement   |  Copyright Policy