Siberia's Batagaika crater expands rapidly, releasing methane and ancient remains

Siberia's Batagaika crater, nicknamed the "gateway to hell," is the world's largest permafrost megaslump and is expanding at an accelerating rate, confirmed by satellite imagery. The thawing permafrost releases stored methane and exposes prehistoric organic remains buried for thousands of years. Scientists warn the process poses a serious climate threat by amplifying global warming.