TOKYO -- The Japanese government announced Tuesday that it will spend $470 million on a subterranean ice
wall and other steps in a desperate bid to stop leaks of radioactive water from the crippled Fukushima nuclear station after repeated failures by the plant's operator.
By tracking the water course uphill, he found its source: Large volumes of snowmelt had flowed into open fissures in the ground and had then melted a passage through a network of subterranean ice
wedges that had formed over millennia (SN: 5/17/03, p.
On Earth, patterned ground is formed by cycles of freezing and thawing in water-soaked soil or by the repeated expansion and contraction of subterranean ice
(SN: 5/17/03, p.