Pregnant T. rex fossil could shed light on evolution of egg-laying

Screen Shot at AM

The GLP aggregated and excerpted this blog/article to reflect the diversity of news, opinion and analysis.

Scientists examining the femur of a 68 million-year-old Tyrannosaurus rex say they’ve confirmed that the creature was a mother-to-be. That would be a major find in the field of paleontology, where researchers are rarely able to determine a dinosaurs’s sex.

The team from North Carolina State University and the North Carolina Museum of Natural Sciences published its findings in the journal Scientific Reports.

“This analysis allows us to determine the gender of this fossil, and gives us a window into the evolution of egg-laying in modern birds,” lead author Mary Schweitzer said in a statement.

ADVERTISEMENT

This particular fossil belongs to a T. rex that roamed what is now Montana millions of years ago, during the Cretaceous Period, and it has a kind of tissue — medullary bone — found only in female birds that are carrying eggs or have just finished laying them, according to the research paper.

Schweitzer, a paleontologist at N.C. State, led a team that believed it found the medullary bone back in 2005. In preparing the bone for further study, Schweitzer also uncovered what she and some other paleontologists believe to be blood vessels — soft tissues somehow preserved for millions of years.

Medullary bone is unlike other bone types. It contains keratan sulfate and is only present during a brief window; once eggs are laid, you can’t find it anymore.

Read full, original post: Scientists believe they’ve found a ‘pregnant’ T. rex

ADVERTISEMENT
ADVERTISEMENT
Outbreak Daily Digest
Biotech Facts & Fallacies
Genetics Unzipped
Infographic: Deaths from COVID-19 are far higher than reported estimates

Infographic: Deaths from COVID-19 are far higher than reported estimates

More than 2.8 million people have lost their lives due to the pandemic, according to a Wall Street Journal analysis ...
seralinistud

Gilles-Éric Séralini: Activist professor and face of anti-GMO industry

The French biologist and his research team--funded by the Rodale ...
vandana shiva

Vandana Shiva: ‘Rock Star’ of GMO protest movement has anti-science history

In a 2012 interview, Bill Moyers referred to Vandana Shiva as ...
News on human & agricultural genetics and biotechnology delivered to your inbox.
glp menu logo outlined

Newsletter Subscription

Optional. Mail on special occasions.
Send this to a friend