These sonographs of bird song, in contrast to the sounds from traditional instruments, show complex patterns on a base frequency.
Bird song sonographs show distinct drawing patterns
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Who Earned a Higher Salary Than You
Work changed over the years. Salaries changed over the years. I was curious: If you compared your personal income from present day, how would it compare to the distribution of salaries in previous decades?
Shifts in How Couples Meet, Online Takes the Top
How do couples meet now and how has it changed over the years? Watch the rankings play out over six decades.