WHEN AN OIL painting is dried and finished, it is supposed to stay that way. Yet when Ida Bronken, an art conservator, began to prepare Jean-Paul Riopelle’s “Composition 1952” for display in 2006, she ...

Sign up for CNN’s Wonder Theory science newsletter. Explore the universe with news on fascinating discoveries, scientific advancements and more. In Rembrandt’s ...

In his 1550 volume Lives of the Artists, painter and architect Giorgio Vasari snuck in praise for the Flemish artist Jan van Eyck in his chapter on the Italian painter Antonello da Messina. Vasari ...