When someone says “and” in the middle of a number where it does not belong.
“2013” should be pronounced “two thousand thirteen,” NOT “two thousand AND thirteen.” When referring to the year, I also accept “twenty thirteen.”
“Two thousand AND thirteen” would be written 2000.13, in which case you should say “two thousand and thirteen hundredths” just to be more precise.
“Consider that you can see less than 1% of the electromagnetic spectrum and hear less than 1% of the acoustic spectrum. As you read this, you are traveling at 220 km/sec across the galaxy. 90% of the cells in your body carry their own microbial DNA and are not “you.” The atoms in your body are 99.9999999999999999% empty space and none of them are the ones you were born with, but they all originated in the belly of a star. Human beings have 46 chromosomes, 2 less than the common potato.
The existence of the rainbow depends on the conical photoreceptors in your eyes; to animals without cones, the rainbow does not exist. So you don’t just look at a rainbow, you create it. This is pretty amazing, especially considering that all the beautiful colors you see represent less than 1% of the electromagnetic spectrum.”” — We Originated in the Belly of a Star, NASA Lunar Science Institute, 2012. (via thinksquad)