An curved arrow pointing right. Engineers at Japan's Fukushima nuclear power plant have designed an "ice wall" to stop the spread of radiation into the groundwater. Produced by Maya Dangerfield.

Not only has the ice wall failed to work sufficiently ... water used to cool the melted nuclear fuel since the Great East Japan Earthquake and tsunami caused the triple meltdown at the plant.

Albert Leichtfried, Markus Bendler and photographer Hermann Erber have just returned from an ice climbing trip to Hokkaido, Japan, during which they made the first ascent of Lector WI7 at Chiyoshibetu ...