The nucleus of each cell in our bodies contains approximately 1.8 metres of DNA in total, although each strand is less than one millionth of a centimetre thick. This DNA is tightly packed into structures called chromosomes, which consist of long chains of DNA and associated proteins.
The U.S. Postal Service is lowering the price of postage stamps for the first time in 97 years, the agency announced Thursday. The price of a stamp to mail a standard letter will drop from 49 cents to 47 cents on Sunday, Fortune reported. The price of a postcard stamp will fall to 34 cents, down 1 cent.
Postage rates did not go up in 2011. One first-class postage stamp is $0.44, and that is for a one ounce letter. For every additional ounce the letter weighs, add $0.17. An ounce in a letter is around five sheets of standard copy paper.Postcards cost $0.28 to send friends and family quick notes about your favorite vacation spots.o keep up with rate changes and know how much postage do I need to send a letter or package, check with the U.S. Post Office at http://www.usps.com/prices/.