Laws of Physics may be changing.

Dateline 20 Dec

The only thing constant is change. Scientists say the Laws of Physics may be changing!

But we'd wager most people don't think that line applies to the actual rules of the universe itself. As it turns out, though, researchers at Microsoft, along with scientists at Brown University and even one expert who consulted for Disney's "Wrinkle in Time" think the laws of physics might actuallybe slowly changing, complicating our quest to understand the cosmos.

Popular Mechanics published a lengthy explainer this week about a paper, titled "The Autodidactic Universe" and published earlier this year, in which the team argued for that precise mind-bending hypothesis. An autodidact, o course, is someone who learns without a mentor or teacher - and, these researchers say, the universe itself itself may be one.

"We ask whether there might be a mechanism woven into the fabric of the natural world, by means of which the universe could learn its laws", the authors wrote in the paper, which has not yet been peer reviewed.

Over time, the theory goes, the universe has sought stability. PopMech draws parallels to animal evolution, too. There are no trilobites or dinosaurs anymore but cats and dogs have survived because they adapted to the environment around them - and the cosmos may have done the same.

In an early version of the universe, for example Newton's laws of gravity - that all matter in the universe attracts other matter with a force directly proportional to the product of their masses and inversely proportional to the square of the distance between their centers - might not have been true yet.

"Over time, that system will teach itself and some fundamental laws will arise and that's really what they're talking about (in the paper)", Janna Levin, a professor of physics and astronomy at Barnard College of Columbia University who wasn't involved in the research, told PopMech. "If the universe can compute with a given set of algorithms, then maybe it can do the same kind of thing we see in artificial intelligence, where you have self-learning systems that teach themselves new rules. And by rules, in cosmology we mean laws of physics".

The paper's authors also acknowledge their own skepticism and wrote their conclusions with caution, warning that their work is only a baby step in the formation of a new theory and requires additional research.

"Of course, this is just a first step", the authors write. "There are varied potential spin-offs from our approach".

It's mind-bending to imagine that the laws of physics might learn and adapt over time. But it reminds us that the universe is stranger than we'll ever know.

- Abby Lee Hood in Off World

Tailpiece.

Got up at a half past 4, said my prayers and turned off to sleep. Woke up at a half past 6, the chores and was ready by a quarter past 8. To the IAF Technical Area for the advance briefing regarding the forthcoming President's visit.

To Poojappura for on-the-site observations.

Dinner at the Foundation with everyone. Helped Maman with his speech preparation.