1 Updates
Rat-size animal may be common ancestor to placental mammalsO'Leary
Photo Credit: Stony Brook University

Rat-size animal may be common ancestor to placental mammals

Feb 8 2013, 12:44pm CST | by

Scientists believe that a small rat-size animal may be the common ancestors of placental mammals, including humans.

LONG ISLAND, N.Y. – Researchers at Stony Brook University here believe they have discovered a rat-size animal that may prove to be a common ancestor to modern day mammals, including humans. In an...

Filed under: news

YouTube Videos

 
 
 

1 year ago

Rat-size animal may be common ancestor to placental mammals

Feb 8 2013, 12:44pm CST | by

Scientists believe that a small rat-size animal may be the common ancestors of placental mammals, including humans.

LONG ISLAND, N.Y. – Researchers at Stony Brook University here believe they have discovered a rat-size animal that may prove to be a common ancestor to modern day mammals, including humans.

In an article published Thursday in the journal Science, Maureen A. O'Leary, project leader, said that the Protungulatum donnae had many of the anatomical characteristics found in placental mammals that bear their young alive. The living ancestors include 5,400 species of animals ranging from shrews to humans.

The conclusions were reached after scientists determined that a combination of genetic and anatomical data demonstrated that the small mammal evolved from 200,000 to 400,000 years after the planet-wide extinction event at the end of the Cretaceious period. Although some small mammals shared the planet with the last of the dinosaurs, they managed to survive the catastrophe.

By examining fossil evidence and DNA data, the scientists linked the mammal to early placental animals. The Protungulatum species is believed to have had a two-horned uterus and a placenta that provided blood to membranes encapsulating the fetus.

According to researchers, in addition, the study revealed that a branch of the placental mammal tree called Afrotheria, (because these animals—which range from elephants to aardvarks—live in Africa today), actually did not originate on that continent but rather in the Americas.

“Determining how these animals first made it to Africa is now an important research question along with many others that can be addressed using MorphoBank and the phylophenomic tree produced in this study,” said author Fernando Perini, a former postdoctoral fellow at the American Museum of Natural History who is now a professor at the Minas Gerais Federal University in Brazil.





Via Stony Brook University .

 

Don't miss ...

 

<a href="/latest_stories/all/all/19" rel="author">Jeffrey B. Roth</a>
A multi-award winning writer, Jeffrey B. Roth is a well-known investigative reporter, who covers crime, law, politics, sciences, business, medicine, education, history and a wide range of other topics. In 2010, Roth won first place for a new series in the Keystone Press Awards, sponsored by the Pennsylvania Newspaper Association. A published short story writer and poet, Roth is listed in the Locus Index of Science Fiction and Fantasy Authors. Currently, Roth writes for CBS Philadelphia, CBS Baltimore, the Philadelphia Examiner and regional publications, including Carroll Magazine, Carroll Business Quarterly and Hagerstown Magazine to name a few. In the past, Roth, a former crisis intervention counselor and teacher, has written for numerous Pennsylvania newspapers, state and national magazines and the Associated Press. He lives in the foothills of the Appalachian Mountains, west of Gettysburg, Pa.

 

blog comments powered by Disqus

Latest stories

Bangladeshi plane catches fire at Nepal airport, passengers safe
Kathmandu, July 28 (IANS) A Bangladeshi aircraft caught fire while landing at Kathmandu's Tribhuvan International Airport (TIA) Monday afternoon, officials said.
 
 
Shift work can worsen asthma, pneumonia
London, July 28 (IANS) A research has found that drugs widely used to treat lung diseases like asthma or pneumonia work better with the body clock.
 
 
Decoded: What triggers sexual arousal in you
New York, July 28 (IANS) Know why just looking at an attractive face stimulates sexual arousal? Well, it takes two to tango!
 
 
Turn your selfie into emoji with this app
New York, July 28 (IANS) Tired of seeing the same yellow-faced smileys? In an age of selfies, how can emojis be far behind?
 
 
 

Latest from the Network

Keith Harris lost $12 million fortune
London, July 29 (IANS) Entertainer and musician Keith Harris lost an $11.9 million fortune because severe dyslexia didn't allow him to understand the contracts he was signing. The 66-year-old, best known for his...
Read more on Celebrity Balla
 
Tarantino geared up to direct 'The Hateful Eight'
Los Angeles, July 29 (IANS) Celebrated actor-filmmaker Quentin Tarantino has decided to go ahead with "The Hateful Eight" despite the fact that its early draft of the screenplay was leaked. The "Pulp Fiction" director...
Read more on Celebrity Balla
 
Kutcher-Kunis to wed in July next year?
Los Angeles, July 29 (IANS) Actors Ashton Kutcher and Mila Kunis, who are getting ready to welcome their daughter, have begun to plan for their wedding. "The wedding will be next July. They want to focus on their...
Read more on Celebrity Balla
 
Lady Gaga portraits auctioned
New York, July 29 (IANS) Pop star Lady Gaga's "video portraits" raised over $1 million at an auction at Watermill Center here. Director Robert Wilson put on display "23 Video Portraits of Lady Gaga" series at his...
Read more on Celebrity Balla
 
Kim Kardashian followed by 'crazy driver'
Kim Kardashian claims a ''crazy driver'' followed her around Los Angeles today (07.28.14). The 'Keeping Up with the Kardashians' star hit back at rumors she was pulled over by police officers in Calabasas, California,...
Read more on Celebrity Balla
 
Elizabeth Banks is 'very genetically blessed'
Elizabeth Banks says she is ''very genetically blessed.'' The 'Hunger Games' actress, who has sons Felix, three, and Magnus, 20 months, with husband Max Handleman, insists she only recently realized she is attractive,...
Read more on Celebrity Balla
 
Courteney Cox receives engagement gifts
Johnny McDaid and Courteney Cox received several engagement presents in his native Northern Ireland. The newly-engaged couple were given complimentary souvenirs by excited fans in the city of Derry while exploring the...
Read more on Celebrity Balla
 
Ashton Kutcher and Mila Kunis to wed next July
Ashton Kutcher and Mila Kunis are planning to get married next July. The couple, who got engaged earlier this year and are expecting their first child, have reportedly set a date for their wedding next summer, as they...
Read more on Celebrity Balla
 
India at the 2014 Commonwealth Games Tuesday
Glasgow, July 29 (IANS) The following is the list of Indians who will be seen in action in the 2014 Commonwealth Games Tuesday. Schedule Badminton (Emirates Arena) Men's singles (Round of 64): R.M.V.Gurusaidutt vs...
Read more on Sport Balla