Question: when will the next ice age start

Paul Higgins answered on 15 Nov 2012:

It was actually supposed to start already. They seem to happen about every 10000 years, and it has been about 10000 since the last one, but so far we have seen the earth get warmer, not colder, so we don’t know what is going on. It might be that the carbon dioxide that humans put in the atmosphere changed the climate cycles.