High-order harmonic generation (HHG) is a process that transforms light into much higher frequencies, allowing scientists to explore areas of the electromagnetic spectrum that are otherwise difficult to reach. However, generating terahertz (THz)…
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This artificial leaf turns pollution into power
“If we’re going to build a circular, sustainable economy, the chemical industry is a big, complex problem that we must address,” said Professor Erwin Reisner from Cambridge’s Yusuf Hamied Department of Chemistry, who led the research….
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A prehistoric battle just rewrote T. rex’s story
Could everything we thought we knew about T. rex growth be wrong? A remarkably complete tyrannosaur skeleton has brought new clarity to one of paleontology’s longest debates: whether Nanotyrannus was its own species or merely a young…
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The bold idea that spacetime doesn’t exist
The question of whether spacetime truly exists should not be particularly controversial or even conceptually difficult once we understand what is meant by “spacetime,” “events,” and “instants.” Believing that spacetime is a real, physical entity…
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Wooden sculpture depicting Hercules found in ancient refuse pit
A rare wooden sculpture depicting Hercules has been discovered in a refuse pit on the Spanish Island of Ibiza.
Known in antiquity as Ebusus, Ibiza became part of the Roman world after the fall of Carthage in 146 BC. Under Roman rule, Ebusus…
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Saturday Citations: Test flight of the X-59; a confounding quantum calculation; the universe is not simulated
This week, researchers published LIGO findings that hint at the existence of second-generation black holes. Astronomers captured a spectacular new image of the Milky Way across a wide range of radio wavelengths. And medical researchers report…
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Diamonds and Lasers: Thermal Management for Chips
Diamonds, lasers, and oil aren’t the first things you may think of when considering ways to keep chips and computers cool. But as modern chip designs pack and stack more transistors into ever smaller spaces, heat has emerged as a critical…
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2 million-year-old teeth reveal secrets from the dawn of humanity
For nearly 100 years, scientists have been intrigued by the fossils of Paranthropus robustus, a sturdy, distant cousin of early humans. This upright-walking hominin was built for chewing tough foods, equipped with powerful jaws and large teeth…
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RL without TD learning – The Berkeley Artificial Intelligence Research Blog
In this post, I’ll introduce a reinforcement learning (RL) algorithm based on an “alternative” paradigm: divide and conquer. Unlike traditional methods, this algorithm is not based on temporal difference (TD) learning (which…
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Print Edition 64 – Nautilus
Issue 64 of the Nautilus print edition combines some of the best content from our September and October 2025 online issues. It includes contributions from neuroscientist Grigori Guitchounts, science journalist Megan…
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