Heron of Alexandria fashioned the fi rst known steam engine, though he only used it to power toys and amuse visitors.

Heron of Alexandria fashioned the fi rst known “steam engine,” though he only used it to power toys and amuse visitors.

Heron of Alexandria fashioned the fi rst known “steam engine,”

Heron of Alexandria fashioned the fi rst known “steam engine,” though he only used it to power toys and amuse visitors.

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