Bookmark Kaumudi Online  Bookmark this site  Editor@Kaumudi  |  Marketing  Print Advt rates  |  Calendar 2012        Go!    
 
 
May 25, Monday 2015 12:39 AM       

       HEADLINES: KPCC general secretary T Siddique resigns                                              Minister Babu has assets worth 200 crore, says Biju Ramesh                                              Many complaints against Siddique, says Sudheeran                                              Gold seized                                              Security lapse for CM                                              Palghar MLA Krushna Ghoda dies of heart attack                                              Afzal Guru was hanged by UPA for 'political reasons': Omar                                              Modi government allergic to Kejriwal: Sisodia                                              Pak expresses concern over Parrikar's remarks on terrorism                                              Taliban kill at least 10 Afghan police officers                                              Three mild tremors hit Kathmandu, surrounding areas                                              Ex-Pak PM Gilani speaks to son abducted two years ago                                              Malaysia home minister says mass graves found                                              IPL raids: CM promises action against cops 'alerting' bookie                                              Roger Federer brings curtain up on French Open                                              Pakistan chief Shahryar Khan proposes home matches in India                                              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
Web monitoring mobile apps for parents  
Scientists find no obvious signs of life in 100,000 galaxies  
Public buses to go green  
Tiny molecule that outsmarts HIV identified  
New enzyme may turn all donated blood to universal type  
Unmanned Russian spacecraft 'plunging to Earth'  
Moon formed 4.47 billion years ago: Study  
NASA spacecraft to crash into Mercury in two weeks  
Rs.60 test detects early-stage prostate cancer  
Facebook integrates WhatsApp into 'Facebook for Android'  
Driverless car completes 5,500km ride across US  
Free mobile apps may take a toll on your smartphone  
Facebook launches new mobile app analytics tool  
Aus researchers discover new treatment for prostrate cancer  
Curiosity rover detects life-supporting nitrogen on Mars  
NASA probe to study magnetic mystery reaches Earth's orbit  
Google to rank websites based on facts not links  
Facebook takes blame for service outages, which hit wider Web  
Facebook suffers outage affecting users worldwide  
Air pollution hits crops more than climate change  
Facebook Lite' launched for low-end Android phones  
Scientists slow down speed of light  
Smartphone app helps Nepali farmers  
Lenovo launches India's cheapest 4G smartphone for Rs 6,999  
BlackBerry launches Classic in India for Rs 31,990  
 
Do you think the CPI will join the UDF?
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