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The relationship, which Mr. Bar estimates dates back about eight years, has been a source of satisfaction for two men who have built an unconventional friendship despite not even knowing the other's last name.
Our estimate is probably conservative; while the phylogeny that we used for rate estimates dates the polar bear/brown bear split at approximately 700 thousand years ago, recent analysis of sub-fossil polar bear remains suggests that polar bears diverged from brown bears as recently as 150 thousand years ago, and that the modern polar bear morphology was present by 130 thousand years ago.
Within B. duperreyi, the estimates dates of divergence between the major lineages began in the Upper Miocene and/or Upper Pliocene (3.9 Myr, 95% HPD: 3.6 5.9; 4.8, 95% HPD 4.2 6.6; 5.7 Myr, 95% HPD: 4.7 6.6; 3.3 Myr, 95% HPD: 2.6 3.7), depending on the calibration method.
Our estimate is probably conservative; while the phylogeny that we used for rate estimates dates the polar bear/brown bear split at ∼700 kya [3], recent analysis of sub-fossil polar bear remains suggests that polar bears diverged from brown bears as recently as 150 kya, and that the modern polar bear morphology was present by 130 kya [17].
Similar(56)
Some of these estimates date back decades (many post-harvest loss studies were conducted during the 1970s and 1980s).
Previous reports relied on estimates dating back to the 1950s and 1960s in some countries outside sub-Saharan Africa.
Previous estimates dated the common ancestor to about 1931.
Other estimates dated Little Foot back as far as 4.1 million years, or as recently as 2.5 million years.
Other estimates date the sign to the early 2000s.
15 Estimates date back to 2 June 2009.
We estimated dates for cores without pith by overlaying sets of concentric circles on the inner rings of the core [47].
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