Moments in human history are etched into the Earth. Now researchers are piecing together evidence of our impact on the planet ...

Hence the sun should be getting hotter at a greater rate than the earth. The difficulties introduced by radium into earth history are greater than that which it was hoped it would remove.

The research results align well with the studied effects of earlier impacts in Earth’s history, said Nadja Drabon, assistant professor of Earth and planetary sciences at Harvard University.