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68 million-year-old conveyor belt

Researchers examining the femur of the 68 million-year-old conveyor belt say they've confirmed that this creature was a mother-to-be. That might be a major find in the field of paleontology, where researchers are rarely in a position to determine a dinosaurs's sexual intercourse.

The team from North Carolina Condition University and the North Carolina Art gallery of Natural Sciences released its findings Tuesday within the journal Scientific Reports.

“This analysis allows us to determine the actual gender of this fossil, and provides us a window in to the evolution of egg-laying within modern birds, " business lead author Mary Schweitzer stated in a statement.

This particular fossil is owned by a T. rex which roamed what is now Montana millions of years ago, during the Cretaceous Period, and it has a kind of cells - medullary bone - found only in woman birds that are carrying ova or have just finished lounging them, according to the research metal conveyor belt.

Theropod dinosaurs like the To. rex evolved into modern birds.

Schweitzer, a paleontologist at N. C. Express, led a team that will believed it found the particular medullary bone back in july 2004. In preparing the bone tissue for further study, Schweitzer additionally uncovered what she plus some other paleontologists believe to become blood vessels - soft cells somehow preserved for countless years. That finding has resulted in her work being co-opted by young-Earth creationists, who else claim such tissues provide evidence that dinosaur bones are much more youthful than scientists think. Schweitzer does not agree with that mesh conveyor bet concept.

The work remains controversial a decade later. But this particular latest paper, which explains new tests conducted within the hotly-contested femur, may a minimum of confirm the presence of medullary bone at long last.

"All evidence we had at the time pointed for this tissue being medullary bone fragments, " Schweitzer said inside the statement. "But there are some calcaneus diseases that occur in wild birds, like osteopetrosis, that can imitate the appearance of medullary bone underneath the microscope. So to be sure, all of us needed to do chemical evaluation of thewire belt tissue. "