But it’s also more than that.

“Corals are foundational,” Dr. Cantin told me, comparing the reef to giant forests, like the Amazon. “It’s not just people from tropical countries who care about them.”

And, he said, those who do care are increasingly concerned. The effects of climate change are accelerating beyond what the ecosystem can handle. Rib Reef, where Dr. Cantin was diving, was teeming with color and life just a year ago; now most of it is just coral skeleton covered in algae that looks like soot.

There is still time to adjust. “It’s a big system,” Dr. Cantin says, with areas that can recover if given a decade or so of prime conditions.

But the world is watching to see what will happen next.

Will tour operators and the Australian government speak with more force about the damage from climate change? Will the giant Adani coal mine, which would bring more coal ships close to the reef, gain final approval? Will more of the reef die — or recover — in the coming year?

The role of science and what it can do to help will be the focus of my upcoming story.

In the meantime, scroll down for a few of my favorite stories from our climate team’s globe-trotting reporters, along a few other stories from The Times this week. And a recommendation for one of Australia’s most innovative (and retro) media start-ups.

As always, tell us what you think at nytaustralia@nytimes.com. If you’re a subscriber, join our private Facebook group for additional discussion, and if you think you know someone who would like to follow our project, forward this newsletter and cajole them (nicely) into signing up.