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Pick up any physics textbook and you’ll find formula after formula that explains how things sway, fly, turn, and stop. The formula describes actions that we can observe, but behind each can be a series of factors that are not immediately apparent. Now, a new AI program developed by researchers at Columbia University appears to have found its own alternative physics. After being shown videos of physical phenomena on Earth, AI did not rediscover the current variables we used; instead, it actually comes up with a new variable to explain what it sees. To be clear, this does not mean that our current physics is flawed or that there is a more suitable model to explain the world around us. (Einstein’s laws have proven to be very powerful.) But they can only exist because they are built on a pre-existing ‘language’ of theories and principles established by centuries of tradition. Given an alternate timeline where other minds tackle the same problem from a slightly different perspective, wou

Qantas has come under fire for outsourcing its baggage handling services during the pandemic. Photo: Phil Carrick JOYCE CHOICE Traveling recently in the evening on Virgin Australia’s very late and delayed arrival from Melbourne, I ran into several baggage handlers on the shuttle bus to the parking lot which may have explained one reason for the baggage issue. All had worked for Qantas and lost their jobs. All rehired by [the aviation services company] Swissport after a period of no work, although some accepted Jobkeepers. They have nothing good to say about unfaithfulness and lost benefits and more. Has Alan Joyce plucked his golden goose? Paul Gerrard, Kellyville, NSW SELLING HARD If Qantas is to step up its game, it has to stop whipping wine, insurance, health care and who knows what else and focus solely on its air travel business. John Swanton, Coogee, NSW THIS WEEK’S LETTER GO IN 60 SECONDS Sue Williams article “the art of deceiving a con man” ( Traveler July 9 )

Today we take a look at the release of the first batch of images captured by the James Webb Space Telescope. This is something we have both been waiting for for almost 25 years. Back in those days, we analyzed the first Hubble images of the distant universe, and the details they reveal are staggering compared to anything we’ve seen in ground-based images. It seems the bar has been raised once again, and Webb is set to herald a new era for astronomy and space research. Its large mirror helps it produce images that are two to three times sharper than Hubble’s, and that go much deeper into space (which means it can see dimmer sources). Webb was also able to see far redder infrared wavelengths, opening up new views of the universe. This is particularly important for studying the early universe because of “cosmological redshift,” a process that refers to the stretching of light (with the expansion of the universe) as it travels through cosmic space. It’s also useful for studying interes

The human genome is littered with “selfish genetic elements”, which do not appear to benefit the host, but only seek to reproduce. Selfish genetic elements can wreak havoc by, for example, distorting sex ratios, impairing fertility, causing dangerous mutations, and potentially even causing population extinction. Biologists at the University of Rochester, including Amanda Larracuente, professor of biology, and Daven Presgraves, University Dean’s Professor of Biology, are using population genomics for the first time to explain the evolution and consequences of known selfish genetic elements. as Segregation Distortion ( SD ). In a paper published in the journal eLife the researchers reported that SD has led to dramatic changes in chromosomal organization and genetic diversity. Sequencing the genome first Researchers use fruit flies as model organisms to study SD , a selfish genetic element that deviates from the rules of just genetic transmission. Fruit flies share about 70 percent of