March against madness - denial has pushed scientists out into the streets | Dana Nuccitelli

America's leaders are playing Russian roulette with our future

This past weekend, hundreds of thousands of people in the US and around the world marched in support of science. Next weekend, the People's Climate March will follow.

Redglass Pictures and StarTalk Radio created a short film in which the brilliant scientist and communicator Neil deGrasse Tyson - though not specifically talking about the science marches - perfectly articulated the motivations behind them.