In Greek mythology, the story of Sisyphus endlessly rolling a boulder uphill is meant to be a cautionary tale. Gravity, in this case, worked against the poor chump. But the smart folks at Advanced Rail Energy Storage North America (ARES) asked: Why not make gravity your friend?
ARES has pioneered a train full of rocks that climbs up a hill, only to roll back down again and repeat the process, Sisyphus style. But instead of a metaphor of futility, this new train technology offers a breakthrough opportunity in clean energy storage.
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