Bird Ancestors
Jun. 2nd, 2005 04:50 pm![[personal profile]](https://www.dreamwidth.org/img/silk/identity/user.png){kind=small}
lsandersonStudy Finds Stronger Dinosaur-Bird Link
By JOHN NOBLE WILFORD
"Scientists have found bone tissue in a Tyrannosaurus rex that they say shows the 70-million-year-old animal was an ovulating female. The estrogen-derived tissue, they determined, is similar to tissue now present only in living birds producing egg shells.
The discovery team concluded in a report to be published on Friday in the journal Science that the finding "solidifies the link between dinosaurs and birds" and "provides an objective means of gender differentiation in dinosaurs."
By JOHN NOBLE WILFORD
"Scientists have found bone tissue in a Tyrannosaurus rex that they say shows the 70-million-year-old animal was an ovulating female. The estrogen-derived tissue, they determined, is similar to tissue now present only in living birds producing egg shells.
The discovery team concluded in a report to be published on Friday in the journal Science that the finding "solidifies the link between dinosaurs and birds" and "provides an objective means of gender differentiation in dinosaurs."
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no subject
Date: 2005-06-02 10:28 pm (UTC)