1. VOA Standard English
  2. VOA Standard English Archives
  1. Technology Report
  2. This is America
  3. Science in the News
  4. Health Report
  5. Education Report
  6. Economics Report
  7. American Mosaic
  8. In the News
  9. American Stories
  10. Words And Their Stories
  11. Trending Today
  12. AS IT IS
  13. Everyday Grammar
  14. America's National Parks
  15. America's Presidents
  16. Agriculture Report
  17. Explorations
  18. The Making of a Nation
  19. People in America
  1. Learning English Videos
  2. English in a Minute
  3. English @ the Movies
  4. News Words
  5. Everyday Grammar TV
  1. Bilingual News
  2. English in a Minute
  3. Learn A Word
  4. How to Say it
  5. Business Etiquette
  6. Words And Idioms
  7. American English Mosaic
  8. Popular American
  9. Sports English
  10. Go English
  11. Wordmaster
  12. American Cafe
  13. Intermediate American Enlish

Scientists Discover Fossil of Strange Sea Worm

12 August, 2017

Scientists found a prehistoric ancestor of an arrow worm among a group of fossils at two national parks in Canada.

The fossils were found in what is now British Columbia, but was once an ocean.

The sea worm was 10 centimeters long and had 50 spines on its head. The spines could close suddenly to capture smaller sea creatures, like shrimp.

Capinatator praetermissus was an ancient sea worm that ate smaller creatures like shrimp. Fossils of the worm were found in British Columbia.
Capinatator praetermissus was an ancient sea worm that ate smaller creatures like shrimp. Fossils of the worm were found in British Columbia.

The scientists reported their discovery in the journal Current Biology in early August.

They are calling the creature Capinatator praetermissus. They say it lived 500 million years ago and is very different from anything alive now.

Capinatator means "grasping swimmer."

Derek Briggs is a scientist from Yale University. He led the expedition. He said the creature was larger than today's similar worms. The arrow worms of today have teeth instead of spines.

Briggs said the worm was probably a good predator because it had so many spines.

The scientists said it is difficult to find evidence of these prehistoric worms because their bodies decayed so quickly. But this discovery was in such good shape, they were able to make a good guess about how the worm looked.

Researchers were able to make a detailed drawing and an animation of how they think the worm moved in the ocean.

Doug Erwin works for the Smithsonian Institution in Washington, D.C. He was not involved in the research. He said the discovery will help scientists better understand the worms and other life from this ancient period.

I'm Dan Friedell.

Dan Friedell adapted this story for Learning English based on reporting by the Associated Press. Caty Weaver was the editor.

What do you think about these worms? We want to know. Write to us in the Comments Section or on 51VOA.COM.


Words in This Story

fossil – n. something (such as a leaf, skeleton, or footprint) that is from a plant or animal which lived in ancient times and that you can see in some rocks

grasp – v. to take and hold (something) with your fingers, hands, etc.

spine – n. a sharp, pointed part on an animal or plant

predator – n. an animal that lives by killing and eating other animals: an animal that preys on other animals

decay – v. to be slowly destroyed by natural processes: to be slowly broken down by the natural processes that destroy a dead plant or body

animation– n. a way of making a movie by using a series of drawings, computer graphics, or photographs of objects (such as puppets or models) that are slightly different from one another and that when viewed quickly one after another create the appearance of movement