Long back, a large collection of material masses coalesced and formed the Earth – it was a single crust or plate with no ...

This is called a destructive or convergent plate boundary ... This is called a constructive or divergent plate boundary. These are usually found under oceans. As the plate moves apart, magma ...

With the increasing power of telescopes and computers, cosmologists today are pushing the boundaries of human knowledge about the universe, seeing further and simulating more accurately that ever ...