"Old Masters" such as Leonardo da Vinci, Sandro Botticelli and Rembrandt may have used proteins, especially egg yolk, in their oil paintings, according to...
• DOJ opens investigation into leaks of apparent classified US military documents
• Analysis: As the Ukraine war grinds on, the EU finds it needs China more than ever
"Old Masters" such as Leonardo da Vinci, Sandro Botticelli and Rembrandt may have used proteins, especially egg yolk, in their oil paintings, according to...