The massive crater appeared violently and explosively in the Siberian tundra last year – a powerful blowout of methane gas throwing ice and rock hundreds of feet away and leaving a gaping ...

Spurred by warmer growing seasons, such shrubby vegetation as alders and willows have crept uphill, replacing alpine tundra the sheep feed on. Dall sheep populations have declined in other ...

A Russian TV crew flying over the Siberian tundra this summer spotted a massive ... may have played a role in the growth and blowout of these mounds. The mounds appear and explode within as ...