Why Earth?

Down to Earth - - SCIENCE -

WHY IS Earth a hab­it­able place than say ce­les­tial neigh­bours like Venus and Mars? Re­searchers have found that the early loss of ra­dioac­tive heat pro­duc­ing el­e­ments such as ura­nium and potas­sium, when as­ter­oids struck the Earth, could have de­ter­mined the evo­lu­tion of Earth's plate tec­ton­ics, mag­netic field and cli­mate all of which have to work to­gether to cre­ate a liv­able Earth. Na­ture Geo­science, July 20

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