April 23, 2014
April 14, 2014
Movers and Starters: Neven Zeremski of Dubb
April 8, 2014
Pop-up Startup
April 1, 2014
Movers and Starters: Mallorie Brodie and Lauren Hasegawa of Bridgit
December 16, 2013
Movers and Starters: Chris Gory
December 11, 2013
Canada Post Says Goodbye to Door-To-Door Delivery in Urban Areas
We Evolved From a Worm, Scientists Say
Scientists from the University of Cambridge believe that all vertebrates are descended from a 2-inch-long worm

 

Scientists from the University of Cambridge believe that all vertebrates are descended from a 2-inch-long worm.

Pikaia gracilens, as the worm-like creature is called, used to swim along the sea floor over 500 million years ago. As the oldest known ancestor to vertebrates, it’s the granddaddy of all mammals, reptiles, amphibians, fish, and birds.

When its fossils were discovered in 1911, scientists first believed the creature was related to leeches or earthworms. However, a series of accumulated clues have led scientists to confirm that Pikaia has a lot more going for it.

Namely, the organism has a vascular system (blood vessels), as well as a notocord (the embryonic beginnings of a spinal cord). The last piece of the puzzle was the identification of myomeres (muscle tissues arranged in a zig-zag pattern) that are common to vertebrates and also present in Pikaia.

The 114 fossil specimens used in the study came from Yoho National Park in British Columbia, where all known Pikaia fossils were found. Not a bad spot for solving the latest piece in the evolutionary puzzle.

____

For more, follow us on Twitter @TorontoStandard and subscribe to our newsletter.

  • TOP STORIES
  • MOST COMMENTED
  • RECENT
By Igor Bonifacic
April 17th, 2014
Industry Movers and Starters: Ian Carnevale of Fora
Read More
By Igor Bonifacic
April 22nd, 2014
Uncategorized Test post
Read More
By Igor Bonifacic
April 28th, 2014
Industry Movers and Starters: Richard Liang of Preo
Read More
By Igor Bonifacic
April 8th, 2014
Editors Pick Pop-up Startup
Read More
  • No article found.
  • By TS Editors
    March 10th, 2014
    Culture Revolutionizing the Beer Drinking Experience with the Sam Can (Sponsored)
    Read More
    By Jordan Sowunmi
    December 27th, 2013
    The Sprawl DO MAKE SAY HEAR: Five Things to Do in The City This Weekend
    Read More
    By Jordan Sowunmi
    December 26th, 2013
    The Sprawl Over 50,000 Torontonians Still Sitting in the Dark
    Read More
    By Jordan Sowunmi
    December 20th, 2013
    The Sprawl Supreme Court of Canada Deems Prostitution Laws Unconstitutional
    Read More

    SOCIETY SNAPS

    Society Snaps: Eric S. Margolis Foundation Launch

    Kristin Davis moved Toronto's philanthroists to tears ... then sent them all home with a baby elephant - Read More