Bookmark Kaumudi Online  Bookmark this site  Editor@Kaumudi  |  Marketing  Print Advt rates  |  Calendar 2012        Go!    
 
 
November 21, Friday 2014 3:32 PM       
       HEADLINES: Assault on LKG student: Case against Saqafi                                              Pattoor land deal: HC cancels Loy Ayuktha order                                              More arrests likely in Manoj murder case                                              Vincent Murder: Four arrested                                              Mullaperiyar: I’m not aware of meeting called by centre, says P J Joseph                                              Five fishermen freed reach Chennai                                              Kohli confirms relationship with Anushka                                              Nigeria: 45 dead in suspected Boko Haram attack                                              Brilliant Manoj, cool Veer take Bengal to Hazare semi-finals                                              Saina, Srikanth look set for World Super Series Finals                                              Schumacher 'communicating with wife by blinking'                                              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
Apple devices under 'masque attack' threat: Cyber agency  
China launches new remote sensing satellite  
Facebook to be mostly video in five years: Zuckerberg  
Six types of killers on Facebook identified  
Bluetooth improvements appear in more devices  
Natural protein in rice helps keep arsenic out in grains  
China launches spacecraft to go to Moon orbit and return back  
Fending off dengue with insecticide-treated uniforms  
App on Android for train enquiry  
Cosmic rays threaten manned missions to Mars  
Comet makes rare close pass by Mars as spacecraft watch  
New Twitter feature allows users to listen to music  
Videocon launches gesture controlled smartphone for Rs 10,499  
Samsung launches Galaxy Note 4 in India for Rs 58,300  
IPhone 6 series to sell in India at starting price of Rs53,500  
Google to launch chat app to take on whatsapp  
Microsoft names next operating system 'Windows 10'  
Blackberry Passport available in India for Rs 49990  
IPhone 6 Plus 'bendgate': Apple plays defense on concerns  
Mobile app for clicking selfie with Isro's Mangalyaan  
Get a selfie with ISRO's Mangalyaan using this mobile app  
Google launches Android One devices at Rs.6,399  
1st high speed train on Delhi-Agra section in November  
IPhone 6, iPhone 6 Plus to hit Indian shores on Oct 17  
Why Apple Watch is a missed opportunity  
 
Do you think the government is trying to protect T O Sooraj?
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