What a real (or fake) Warhol sketch tells us about the idea of artistic authenticity

A New York art collective called MSCHF says it got an early sketch by artist Andy Warhol, made 999 copies of it, mixed in the real drawing with the fakes, then sold all 1,000 without knowing which was the real Warhol sketch. Blasphemy? Maybe not, according to the art critic and Warhol biographer we spoke to. The electric vehicle maker Rivian makes its debut on the Nasdaq. The BBC reports from the COP26 climate conference regarding a draft agreement from the United Nations.