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As the ice caps in Canada receded and opened up a path southward, the colonists swept across the vast unpopulated continent.
The area was declared safe after a few hours.'He was an engineering apprentice and was passionate about cars, his hockey and football, especially his team, Manchester United.
Sensing an easy target, they closed in for the kill.
Almost 14,000 years later, there is no way to tell how many hits it took to bring the beast to the ground near the coast of present-day Washington state.
When your car's exhaust pipe falls apart noisily, it is because the steel from which it was constructed has, over several years, reacted with oxygen and rainwater to form rust. But that's a relatively fast example involving a relatively unstable compound.
The compounds making up the vast majority of Earth's land surface - the minerals that make up rocks - are, by and large, very slow to react.