Dating a t rex
Schweitzer and her colleagues found that dinosaur soft tissue is closely associated with iron nanoparticles in both the , a type of duck-billed dinosaur.They then tested the iron-as-preservative idea using modern ostrich blood vessels."The problem is, for 300 years, we thought, ' Well, the organics are all gone, so why should we look for something that's not going to be there? The obvious question, though, was how soft, pliable tissue could survive for millions of years. 26) in the journal Proceedings of the Royal Society B: Biological Sciences, Schweitzer thinks she has the answer: Iron.Iron lady Iron is an element present in abundance in the body, particularly in the blood, where it is part of the protein that carries oxygen from the lungs to the tissues.It forms minuscule iron nanoparticles and also generates free radicals, which are highly reactive molecules thought to be involved in aging."The free radicals cause proteins and cell membranes to tie in knots," Schweitzer said. The band initially called Tyrannosaurus Rex, released four folk albums under this banner. Login to add information, pictures and relationships, join in discussions and get credit for your contributions. Rex were an English rock band, formed in 1967 by singer-songwriter and guitarist Marc Bolan.
The researchers also analyzed other fossils for the presence of soft tissue, and found it was present in about half of their samples going back to the Jurassic Period, which lasted from 145.5 million to 199.6 million years ago, Schweitzer said.
In most cases, microbes feast on a dead animal's soft tissue, destroying it within weeks.
The tissue must be something else, perhaps the product of a later bacterial invasion, critics argued.
"They basically act like formaldehyde." Formaldehyde, of course, preserves tissue.
It works by linking up, or cross-linking, the amino acids that make up proteins, which makes those proteins more resistant to decay.