The races involve a grueling training program, which only 36percentt of birds survived through in a 2011 race, separating the social creatures from their mates and nests, banding them, and releasing the birds hundreds of miles away in a foreign environment.
In the United States, racism came under greater attack during the civil rights movement of the 1950s and '60s, and laws and social policies designed to keep races separated were gradually eliminated.
The ranges of many Heliconius species are broken up into divergent wing pattern races separated by narrow hybrid zones.
It has been recently demonstrated that the reduction in fertility of hybrids between the house mouse races separated by fixed monobrachial differences is not so pronounced as previously supposed [ 14].
Party affiliation and politics -- and, surely, background and race -- separated the president from Dr. King.
Cooke could not keep up with the blistering pace in Sunday afternoon's race, was separated from the leading three and ended in the chasing pack.
Models were not statistically significant when treatments and race were separated, presumably from the reduction in sample size and subsequent loss of statistical power.
