But March 21 comes and goes every year without anyone pausing to remember that Washington broke the NFL's modern-era color barrier as a member of the Los Angeles Rams on that date in 1946 -- a full year before Robinson's milestone. Every baseball player wears Robinson's No. 42 on April 15.
The finding is the journal Public Library of Science ONE. [Sarah Klemuk et al.,  Adapted toRoar: Functional Morphology of Tiger and Lion Vocal Folds ]. When we say loud, we mean loud. Lion roars can travel over five miles, andreach up to 114 decibels, which is asloud as a jet airplane taking off. The researchers suggest that the fatis there to cushion the cords, and to provide tissue for repair if the cords get damaged.
Wolves can hear well up to a frequency of 25 khz. Some researchers believe that the actual maximum frequency detected by wolves is actually much higher, perhaps up to 80 khz (the upper auditory limits for humans is 20 khz), also according to some naturalist wolves' hearing is greater than that of the dog.