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The Most Complete Titanosaur ever Discovered….

Sometimes it is simply the size of some of nature’s creatures leaves me in awe…  And, it was still growing!  Wow!

Lacovara, K.J., Lamanna, M.C., Ibiricu, L.M., Poole, J.C., Schroeter, E.R., Ullmann, P.V., Voegele, K.K., Boles, Z.M., Carter, A.M., Fowler, E.K., Egerton, V.M., Moyer, A.E., Coughenour, C.L., Schein, J.P., Harris, J.D., Martinez, R.D., & Novas, F.E.  2014. A Gigantic, Exceptionally Complete Titanosaurian Sauropod Dinosaur from Southern Patagonia, Argentina. Scientific Reports 4 (6196).

My Precis

The 2/3’s complete skeleton of a titanosaur, Dreadnoughtus schrani, found recently in Argentina, would have been approximately 26m in length and weighed 593 metric tons and, may have still been growing when it died.

My Precis Expanded

Not much is known or understood about titanosaurs, the largest of the dinosaurs, as the only skeletons that have been found have been fragmentary, frustrating attempts to estimate size and other characteristics but the recent discovery of a titanosaur in Argentina has given scientists an almost 2/3’s complete and extremely well preserved skeleton to work with. This is the most complete titanosaur ever found and was given the name Dreadnoughtus schrani; Dreadnought from Old English, meaning ‘fearing nothing’. Schrani, honouring Adam Schran for his support of this research.

When the skeleton of Dreadnoughtus was compared to the skeletons of other titanosaurs, differences in the shapes and sizes of the bones were found that make Dreadnoughtus unique. This is one of the largest of these giants with an estimated length of 26m and a weight of 593 metric tons. Examinations of the bones have revealed that even at this size, this titanosaur may still have been growing!

I found the original article here: http://www.nature.com/srep/2014/140904/srep06196/full/srep06196.html

If you have any trouble locating the article please contact me or, call your local college or university library for assistance.

The Discovery of an Element – Argon

I can only imagine the excitement of discovering something so unique as  a new gas and there seemed to be much enthusiasm in this lecture.  To come to the realization that the discovery might be an element, well…. I think that it is a good thing that Lord Rayleigh decided to continue upon his rather “unacceptable” career as a scientist.

This is a lecture filled with unfamiliar words and details.  If I have anything wrong, please let me know.  I look forward to hearing from you!

 

The Article

Rayleigh, Lord. 1895. Argon. American Association for the Advancement of Science, Vol. 1, No. 26 (Jun. 28, 1895), 701-712.

 

My Precis

Using scientific methods of derivation and measurement, evidence of a new gas and possibly a new element called  “Argon” has been found.

 

My Precis Expanded

More than 50 years ago the French scientist, Regnault, introduced scientific methods of weighing gases and using these methods weights were obtained for nitrogens derived in two different manners.  It was found that the results varied even after the tests were repeated. We explored this discrepancy, rather than erasing its existence, by repeating the experiments of deriving nitrogen through both atmospheric and chemical means. The methods gave consistently different weights and quality and further testing proved that the new, lighter gas was not a mixture of gases or impure but pure nitrogen and the heavier ingredient we had isolated was given the name “Argon.”

The spectrum of argon obtained from the oxygen and chemical methods are the same and the density has been found to be between 19.9 and 19.7 with a ratio of specific heats of 1.65. The theoretical limit of specific heats is 1.67 and ordinary gases such as oxygen, nitrogen, hydrogen, etc., have numbers around 1.4. Therefore the density of argon places it into a type of gas known as monatomic.

This evidence strongly suggests that Argon is an element.

 

I found the original article here and downloaded my copy on September 5, 2014:

http://www.jstore.org/stable/1624351

This article is more easily available using this link.  If you have any trouble locating the article please contact me or, call your local college or university library for assistance.