On this clip from the celebrated science schooling collection Cosmos (1980), the astronomer Carl Sagan explores the life and legacy of the traditional Greek polymath Eratosthenes, who, within the third century BCE, not solely understood Earth to be spherical, however was in a position to calculate its circumference with outstanding accuracy. In detailing Eratosthenes’ ingenious strategies, Sagan supplies a captivating science historical past lesson that doubles as a tribute to the outstanding ingenuity of historic thinkers, who have been in a position to uncover extraordinary truths with the only of instruments.
Through The Kid Should See This
