• GreyEyedGhost@lemmy.ca
    link
    fedilink
    English
    arrow-up
    2
    arrow-down
    2
    ·
    9 months ago

    The first heat engines were fire pistons, which go back to prehistory, so 12k to 25k years sounds about right. The next application of steam to make things move happened about 450 BC, about 2.5k years ago. Although not a direct predecessor to the ICE, they all are heat engines.