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.
Here is a interesting article on what makes lions and tigers able to roar so loud. As well as what they measured. Here is a paragraph from the article. They came up with 10 to 430 hertz, or cycles per second, which is consistent with known roaring frequencies of 40 to 200 hertz in lions and 83 to 246 hertz in tigers, Riede says.