Our retired senior curator and curator of public life discusses the history of snow globes with host Mo Rocca, who also shows us autonomous race cars, the teen who invented a tiny earthquake warning system, and self-healing concrete.

Our curator of agriculture and the environment discusses combines with host Mo Rocca, who also shows us high tech solar shingles for rooftops, a vibrating smoke alarm for those with hearing impairments, and floor tiles that generate power.