New research shows Earth may have been contaminated with high levels of mercury long before a giant celestial body struck the planet, spelling the end of dinosaurs. While some scientists believe the ...
Mass extinctions throughout the history of the Earth have been well documented. Scientists believe that they occurred during a short period of time in geological terms. In a new study, ...
Mass extinctions throughout the history of the Earth have been well documented. Scientists believe that they occurred during a short period of time in geological terms. In a new study, paleobiologists ...
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