Okay, can you cite a peer reviewed publication which makes that prediction (a new ice age) with the certainty you claim? Time magazine is not a peer reviewed publication and if you get your science from the media then you will just get bad science. Back in the 70s, even though global temperatures had been reasonably stable (or possibly declining) most scientists were predicting global warming would dominate global dimming. As the evidence of the last 40 years came in most scientists (who were defying the current trend of global temperatures) because almost all scientists, at least the ones who do climate research.
Your bad science teacher and the fact that science journalists aren't worth a piss in the ocean doesn't mean the scientists had it wrong. Go read the peer reviewed literature, I promise you for ever paper you have implying we may be approaching another ice age I can find 3 going the other way.