However, a recent study of two independent fossil finds from Sri Lanka, one dated to approx.

The study of the nervous system dates back to ancient Egypt.

Preliminary studies have dated the age to as old as from the thirteenth to the 14th century.

Later studies had dated it at 93 Ma by the K-Ar dating technique.

The study of and the taste for collecting bookplates hardly date farther back than the year 1860.

Various archaeological studies have dated the carvings from between 3000 BC to 1300 AD.

As of June 2009, the most recent study dates the origin of haplogroup R to 66.6kya with a 95% confidence interval of 52.6-81kya.

But a study published in the current issue of the journal Nature Genetics dates the migration as much more recent, a mere 20,000 years or so ago.

One recent study would date Meliteniotes' birth to between the years 1240 and 1250; another study suggests that he had, as a teacher, George Akropolites.

While the initial studies date back to 2001, full-scale development was released only in February 2003.