Were there any venomous dinosaurs? There's been speculation, but no solid proof. Breakthroughs, discoveries, and DIY tips sent every weekday. It's one of the most memorable scenes in the original movie: the dinosaur spreads the frill around its neck and sprays deadly venom from its jaws. The frill (inspired by Australia's frilled lizard) is pure Hollywood fantasy.

Twenty-four years ago, the surgeon Santiago Horgan performed the first robotically assisted gastric-bypass surgery in the world, a major medical breakthrough. Now Horgan is working with a new tool that he argues could be even more transformative in operating rooms: the Apple Vision Pro. Over the last month, Horgan and other surgeons at the University of California, San Diego have performed more than 20 minimally invasive operations while wearing Apple's mixed-reality headsets. Apple released the headsets to the public in February, and they've largely been a commercial flop. But practitioners in some industries, including architecture and medicine, have been testing how they might serve particular needs.

Martin Burch had been working for the Wall Street Journal and its parent company Dow Jones for a few years and was looking for new opportunities. One Sunday in May 2021, he applied for a data analyst position at Bloomberg in London that looked like the perfect fit. He received an immediate response, asking him to take a digital assessment. The assessment showed him different shapes and asked him to figure out the pattern. "Shouldn't we be testing my abilities on the job?" he asked himself.

UK business investment in new technologies such as quantum computing, blockchain and artificial intelligence is set to jump in the next five years, according to research by the CBI and Accenture. The proportion of firms seeking to invest in quantum computing will increase from 11% today to 32% in five years. The number of those starting to put money into blockchain and other distributed ledger technologies will double from 16% today to 35%. Whilst a third of respondents are also due to begin spending on AI. "These technologies will be used not only to improve customer experience and reduce costs, but open up new frontiers of innovation, from drug discoveries to drone deliveries. As we move from research to reality, investment in quantum computing is set to leap threefold, and could make possible experiments that are currently too costly and impractical," says Felicity Burch, CBI Director of Digital and Innovation.

The CFR+ algorithm for solving imperfect information games is a variant of the popular CFR algorithm, with faster empirical performance on a range of problems. It was introduced with a theoretical upper bound on solution error, but subsequent work showed an error in one step of the proof. We provide updated proofs to recover the original bound.

She woke up with a tickle in her throat. This was worrying for Ashly Burch, who, at 27, is a rising star in the small world of voice actors, best known for her work in video games. She knew actors who had blown out their voices in the studio. So leaving her house that morning Burch sipped a soothing mix of chai tea and pea milk. "Dairy creates mucus, and that's not a good sound."

Oh, right: Burch is also the voice of Chloe in the hit narrative adventure game Life is Strange. She also has roles in Borderlands 2, Mortal Kombat X, Team Fortress 2, Gravity Ghost and a handful of other mainstream and independent games. Before even that, Burch was a regular name in the gaming world with her online series, Hey Ash, Whatcha Playin'?, which she still produces with her brother, Anthony Burch. They have more than 280,000 subscribers on YouTube alone. "The intention was not for it to be the thing that led to all the other things," Burch says.

The leading approach to solving large imperfect information games is to pre-calculate an approximate solution using a simplified abstraction of the full game; that solution is then used to play the original, full-scale game. The abstraction step is necessitated by the size of the game tree. However, as the original game progresses, the remaining portion of the tree (the subgame) becomes smaller. An appealing idea is to use the simplified abstraction to play the early parts of the game and then, once the subgame becomes tractable, to calculate a solution using a finer-grained abstraction in real time, creating a combined final strategy. While this approach is straightforward for perfect information games, it is a much more complex problem for imperfect information games. If the subgame is solved locally, the opponent can alter his play in prior to this subgame to exploit our combined strategy. To prevent this, we introduce the notion of subgame margin, a simple value with appealing properties. If any best response reaches the subgame, the improvement of exploitability of the combined strategy is (at least) proportional to the subgame margin. This motivates subgame refinements resulting in large positive margins. Unfortunately, current techniques either neglect subgame margin (potentially leading to a large negative subgame margin and drastically more exploitable strategies), or guarantee only non-negative subgame margin (possibly producing the original, unrefined strategy, even if much stronger strategies are possible). Our technique remedies this problem by maximizing the subgame margin and is guaranteed to find the optimal solution. We evaluate our technique using one of the top participants of the AAAI-14 Computer Poker Competition, the leading playground for agents in imperfect information setting