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Humans are releasing CO2 and methane that's causing Earth's ice to melt rapidly. Can we stop ice from melting before its catastrophic consequences?
It's just a matter of time until an asteroid sets course for the earth. Our only hope of prevention? High-tech computers, satellites, and rockets.
Volcanoes can erupt anytime, anywhere in the world, threatening hundreds of millions of people. A supervolcano could devastate our entire planet