英文的奇闻异事

1/ The speed of light is generally rounded down to 186,000 miles per second. In exact terms it is 299,792,458 m/s (metres per second - that is equal to 186,287.49 miles per second).2/ It takes 8 minutes 17 seconds for light to travel from the Sun's surface to the Earth.3/ October 12th, 1999 was declared "The Day of Six Billion" based on United Nations projections. 4/ 10 percent of all human beings ever born are alive at this very moment.5/ The Earth spins at 1,000 mph but it travels through space at an incredible 67,000 mph.6/ Every year over one million earthquakes shake the Earth.