The phrase "ancient estimates" is correct and usable in written English.
It can be used when referring to historical calculations or assessments made in the past.
Example: "The ancient estimates of the population size in the region were surprisingly accurate for their time."
Alternatives: "historical estimates" or "old estimates".
These relatively recent estimates for the origin of the European brown bear lineages stand in contrast to the more ancient estimates of Hofreiter et al. [63], which were calibrated using the split between brown bears and their sister species (cave bears; Ursus speleaus) at 1.2 1.7 Myr [64], [65].
Second, the ancient estimates could have resulted from the application of an inadequate molecular clock.
In this view, interpreting Kimberella as a protostome leads to unduly ancient estimates for the origin of all the more universal clades encompassing Protostomia.
Inspired by this result, we measured the upper limit of stereopsis as a function of eccentricity (Ghahghaei et al, 2017) and found that it changed very gradually from zero to 10 degrees, consistent with Ogles ancient estimate (1954).
Recombination in the present data possibly caused the estimate of the height of the tree to be greater, thus resulting in more ancient age estimates [ 44].
Notably, choice of molecular rate model (autocorrelated or independently distributed rates) has an especially strong effect on estimated times, with the independent rates model producing considerably more ancient age estimates for the deeper nodes in the phylogeny.
The researchers also only included temperatures, not precipitation, in their climate maps, likely because ancient rainfall estimates remain shoddy, he adds.
In this vein, the ancient age estimates reported from previous molecular studies are seen as artefacts of oversimplified or improperly executed methods.
The most ancient pseudogene estimated in the analysis is the opossum gene Modo-OR2W2P, which is estimated to have pseudogenized even before the time associated with human-platypus split around 180 million years ago (mya).
Dr. Zahi Hawass is director of excavations at the ancient cemetery, estimated to hold several hundred tombs and as many as 10,000 mummies.
Perhaps a quarter of a million Jews died during the siege (although one ancient historian estimated more than 1 million), plus more afterwards until the war concluded in 74 C.E. with the fall of Masada.
