Perhaps most importantly, Lucy’s discovery foreshadowed a series of fossil finds that filled in the scientific picture of her species. By 1978, enough evidence had accumulated to establish Lucy as the ...
Over millions of years ... called convergent evolution. The most striking example of this may be in the development of the eye, says Wills. “Convergence becomes more remarkable the longer the ...
The human lifespan is the maximum number of years an individual from the human species can live based on observed examples. Though this definition of lifespan may seem simple enough, it is often ...
The U.S. inflation rate by year shows how much prices for goods and services rise year-over-year. The inflation rate typically reacts to phases of the business cycle, which is the natural cycle of ...