All the great mountain ranges is formed in this way,as the planet's inner heat forced the continental plates to collide,

crumpling the surface of the Earth.

The European Alps,

the South American Andes,

The Himalayas of central Asia.

They are all relatively young,born out of recent collisions between plates.

Sometimes, you can actually see their growing pains.

Earthquakes are a horrific force of destruction.

Entire cities can be wiped out, at terrible human cost.

They happen with the Earth's plates push against each other and get stuck.

Stress builds up until it's suddenly released.