As the climate warms more microscopic pathogens could thaw and come back to life.
Russian scientists discover 20 small sinkholes surrounding a larger crater in Siberia.
Scientists plunge into a deep funnel in a region in Siberia known as The End of the World.
The cause behind the Bermuda Triangle could also explain mysterious holes appearing in Siberia.
Strange spikes in Siberia seen from space have an Earthly explanation.
Karina Chikitova was found emaciated but alive, after enduring freezing temperatures, with only berries to sustain her.
What created the mysterious giant holes found in Siberia, and could they appear anywhere in the United States?
A second massive crater has appeared in a remote part of Siberia. It's uncertain yet what's caused the sinkholes, but experts have suggested global warming may play a part.
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