Bits of pottery nearly as old from Hunan caves had been found earlier, but some archaeologists suspected that the samples, tested using radiocarbon dating, were contaminated with a mineral called calcite, which was potentially older than the pottery itself.
But in recent years, potentially older artifacts have turned up at a handful of sites, including Monte Verde in southern Chile and the Debra L. Friedkin site in central Texas, suggesting that people lived in the Americas long before the Clovis technology turned up.
If motorcycle smog checks become law, the vehicles would join light-duty diesel trucks, which will be subject to smog checks beginning next year, and, potentially, older vehicles.
While pathogen-associated virulence factors might be expected to be associated with GIs, since many are new genes that have been recently acquired, it is notable that "common" virulence factors with potentially older evolutionary origins have also been retained in GIs across multiple genera.
Potentially older populations from large lakes show less genetic differentiation (i.e. lower F ST 's) than populations from presumed younger habitats such as small ponds [ 22- 28].
The remaining 9% of unexplained breakdowns may be the result of heterogeneities in herd risk, reflecting the demographic factors seen here, in particular herd size and fattening herds and their potentially older age distribution.
Inclusion criteria consisted of males and females, aged 18 30 years (and spouses starting at age 16 years and potentially older than 30 years), residing in one of 10 study villages within the Kilombero/Ulanga districts of the Ifakara Health and Demographic Surveillance System 13 in south-west Tanzania.
That means that GE's holographic discs could be played on modified Blu-ray players, which could potentially handle old DVDs and CDs, as well.
