1904 - Charles J. Pedersen was born.

Pedersen was an American biochemist who shares the 1987 Nobel Prize in Chemistry with Donald Cram and Jean-Marie Lehn for their research and development of host-guest chemistry. Host-guest chemistry is where two or more molecules/ions bond in unique ways due to their structure in other than covalent bonds. Pedersen's work was with the chemistry and synthesis of crown ethers or cyclic polyethers.