A team of Harvard scientists believe the remnants of an ancient Earth, dating to the time another planet collided...

Originally shared by Alexander Light (HumansAreFree)

A team of Harvard scientists believe the remnants of an ancient Earth, dating to the time another planet collided with ours to produce the moon, may still be lodged deep within the Earth’s mantle: http://humansarefree.com/2014/06/harvard-scientists-there-may-be-ancient.html