Nobel prizes mark 100th anniversary

This year the Nobel prizes given out for world-class accomplishments in physics,

U.S. stamp for the 100th year of Nobel prizes.

chemistry, literature, peace, and physiology or medicine are a century old.

Founder Alfred B. Nobel, a chemical engineer who became rich after inventing

dynamite, set aside a fortune in his will to establish prizes for those who have

“conferred the greatest benefit on mankind.”