Earth got even hotter than we thought during past 500 million years

The average surface temperature varied more widely and was even hotter than previously thought during much of the past 500 million years, according to the most rigorous study so far

​The average surface temperature varied more widely and was even hotter than previously thought during much of the past 500 million years, according to the most rigorous study so far The average surface temperature varied more widely and was even hotter than previously thought during much of the past 500 million years, according to the most rigorous study so far