The most terrifying aspect of the U.S. political drama isn’t the revelation that the president has abused his power for personal gain. If you didn’t see that coming from the day Donald Trump was elected, you weren’t paying attention.

No, the real revelation has been the utter depravity of the Republican Party. Essentially every elected or appointed official in that party has chosen to defend Trump by buying into crazy, debunked conspiracy theories. That is, one of America’s two major parties is beyond redemption; given that, it’s hard to see how democracy can long endure, even if Trump is defeated.

However, the scariest reporting I’ve seen recently has been about science, not politics. A new federal report finds that climate change in the Arctic is accelerating, matching what used to be considered worst-case scenarios. And there are indications that Arctic warming may be turning into a self-reinforcing spiral, as the thawing tundra itself releases vast quantities of greenhouse gases.

Catastrophic sea-level rise, heat waves that make major population centers uninhabitable, and more are now looking more likely than not, and sooner rather than later.