Fossil fuels powered the industrial revolution. Would aliens need a similar power source to jump-start a technical revolution ...
A fossil is physical evidence of a prehistoric plant or animal ... Earth's surface is broken up into huge, irregularly shaped pieces - tectonic plates - that fit together like a jigsaw. These plates ...
Of course, fossils up a mountain are not evidence ... The real answer came much later when we finally learned about plate tectonics in the 1960s, a development from the continental drift theory ...
It has vast water oceans and abundant life. But Earth is also unique because it is the only planet with plate tectonics, which shaped its geology, climate and possibly influenced the evolution of ...