No, this isn't a post about climate change, neither for or against, convinced or skeptical. But I'm not above -- before I move on to today's main topic -- a crack against those (not typically scientists) who believe anything in science is ever proven. What science can do is:
(a) propose theories (read: models, aka simplified representations) of reality useful for solving problems and making predictions in particular circumstances and
(b) refine -- or refute -- theories as their shortcomings and limitations become clear, or as conflicting data show up.
(A favorite Einstein quote, after which I promise to come to the point: “Everything should be made as simple as possible, but no simpler.”)
|A brief history of time and space|
These and other difficulties were resolved a century ago with Einsteinian gravity theory -- aka General Relativity. A century later, after many tests have been performed to poke and prod GR theory for limits to its accuracy and applicability, theorists look for alternative models (see Alternatives to General Relativity) and experimentalists continue to test GR's predictions and implications (see "Tests of general relativity").
And with all that by way of stage setting, let's have a look at some recent peering into the dusty corners of our physical understanding of the universe ...