In the above Earth map you can see every known hurricane and tropical storm since 1851. If you worry about hurricanes and you like to know where have gone in the past, have a closer look at the chart after the jump. Image credit: John Nelson, IDV Solutions
How does a hurricane form? Although a complete picture is still being researched, insight into this process might be gleaned by watching the above time lapse movie of the formation of Hurricane Irene, a large storm system currently threatening the eastern seaboard of the USA.