Learn about inventor Mária Telkes, who spent nearly 50 years exploring how to harness the sun’s power. Battling sexism at MIT, she persevered to design the first successfully solar-heated house in 1948 and held more than 20 patents.

Discover the incredible characters and epic stories that have shaped America’s past and present. Television’s most-watched history series, acclaimed by viewers and critics alike, has been honored with every major broadcast award.