The California gold rise
the Japanese bombed pearl harbor in hawaii.
September 11,2001 Attacks.
The biggest world event in 2007 is debatable. In the US, the last Harry Potter book was released, which was a huge event. The mortgage crash began in 2007 and there were huge breakthroughs in stem cell research. The Virginia Tech tragedy took place in 2007 and so did the Saffron Protests.
America and China and many other places :P
Crispus Attucks was a slave and dock worker in Boston during the Boston Massacre. He was the first person killed in this assault and said to be the first person killed in the Revolutionary War in 1770.
gold
The forty niners were called the forty niners because the gold rush was in 1849.
It represents the approximate number associated with some ongoing event - whatever the event may be.
This cataclysmic event is called eruption.
summer solsticeStonehenge is associated with the summer Solstice.
Earthquakes.
Please rewrite we don't know associated with what.
The '49ers were named so due to the Gold Rush having began in 1849.
He was awesome
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The risk associated with an event is the product of the probability of the event occurring and the hazard associated with the event.
The concept of the first race in the world is associated with the historical event of the Olympic Games in ancient Greece.