650 million years ago, Earth was covered in ice during an "extreme" 15-million-year-long ice age. New research suggests that towards the end this period, Earth may not have been fully frozen, however.

A MYSTERIOUS cosmic object has been spotted zooming through our solar system – and astronomers say it is only the third of ...

What would happen if you put a baseball-sized piece of neutron star on the Earth? Would it fall to the core of the Earth and ...