October 21, 2014
October 21, 2014
Get to know… Ari Goldkind
October 20, 2014
Toronto gets a set of imaginary TTC stops courtesy of one very creative designer
Someone is planning a post-Rob Ford themed party for Monday
Toronto can no longer claim to have the most high-rises going up in the world
We went skydiving for journalism.
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
October 20th, 2014
Editors Pick Toronto can no longer claim to have the most high-rises going up in the world
Read More
By Igor Bonifacic
October 20th, 2014
Editors Pick Toronto gets a set of imaginary TTC stops courtesy of one very creative designer
Read More
By Igor Bonifacic
October 20th, 2014
Editors Pick Someone is planning a post-Rob Ford themed party for Monday
Read More
By Dylan Freeman-Grist
October 20th, 2014
Editors Pick We went skydiving for journalism.
Read More
  • No article found.
  • By Lauren Pincente
    October 21st, 2014
    Editors Pick Get to know... Ari Goldkind
    Read More
    By Igor Bonifacic
    October 20th, 2014
    Editors Pick Toronto gets a set of imaginary TTC stops courtesy of one very creative designer
    Read More
    By Igor Bonifacic
    October 20th, 2014
    Editors Pick Someone is planning a post-Rob Ford themed party for Monday
    Read More
    By Igor Bonifacic
    October 20th, 2014
    Editors Pick Toronto can no longer claim to have the most high-rises going up in the world
    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