Fossil Rises From its Grave

gokulpod writes "Scientific American reports that a family of animals known as Diatomyidae thought to have been dead for 11 million years has been discovered in Laos. From the article: 'Fossilized remnants of this group have been found throughout Asia with a distinctive jaw structure and molars. It represents a rare opportunity to compare assumptions derived from the fossil record and an actual living specimen to determine overall accuracy of the techniques involved. This discovery also provides a compelling argument for preservation efforts in Southeast Asia.'"

Comments

Correction

[brian0918]

Knowledge of the Laotian rock rat has been around for about a decade now, but it was originally classified in a new family, prior to its connection to the 11 million year old family.

Re:Carbon dating methods...

[G. W. Bush Junior]

A burning question... does this call into question the carbon dating methods that "proved" this creature was 11 million years old? Or does this finally prove that these creatures have resurrected from their fossilized remains?

It's important to realize that radio carbon dating can't be used to date anything that much older than around 50,000 - 60,000 years old. After that period of time, there simply isn't enough C14 left in the samples to measure. Another important thing to notice is that the amount of radioactive CO2 in the atmosphere varies with time, depending on cosmic radiation, so you have to use a reference to calibrate your result against, like dendrochronology or air captured in glaciers.

In other words, this animal DEFINITELY wasn't dated with radiocarbon dating... the age was probably based geology - ie. how deep the animal was found. (But I'm not a paleontologist)