there are colder and warmer periods in earth history. what are wrong are over-hyped predictions, not the possibility that we could be entering a cold period.
I don't personally know. but I do know that that "science" doesn't know either
science is highly political now, but it has always been difficult for scientists to let go of pet theories, especially ones that are widely believed, because their careers suffer. there is a book about this that says basically the oldies who are wedded to the current paradigm have to die off before progress is made
the danger today is that there is so much money involved, and enough power to do really stupid things to supposedly save the world. sick of the megalomanics running things. they don't really know, but insist they do