Arctic freeze and snow wreak havoc across the planet

[Richard]

I believe it could happen. It's happened before. It's a natural cycle of the earth. Why don't you believe it AJ?

[Tyson]

i think this freeze is natural but its not hard for it to be tailor-made for this year. what if its the ice age that pushes humanity underground or into the ice, finally off the surface. what about it supposed to be hot?