Scientists found a two-century lag between temperature changes near Earth's poles — and maybe a "bipolar seesaw" temperature cycle.
Other scientists say that shock waves from the Chicxulub impact may have triggered volcanic eruptions in the Deccan Traps and elsewhere....
...We don't, I think, have all the answers about how Earth's climate changes and what we should do about it: but we're discovering what some of the questions are. That's a good start.
More at A Catholic Citizen in America.