A screen displays portraits of Frances Arnold of the United States, George Smith of the United States and Gregory Winter of the U.K. during the announcement of the winners of the 2018 Nobel Prize in Chemistry at the Royal Swedish Academy of Sciences on Wednesday.

A screen displays portraits of Frances Arnold of the United States, George Smith of the United States and Gregory Winter of the U.K. during the announcement of the winners of the 2018 Nobel Prize in Chemistry at the Royal Swedish Academy of Sciences on Wednesday