Science & patent news

Following a period of turmoil, Wikimedia Foundation appoints new director

Earlier today, Wikipedia founder Jimmy Wales announced that the Wikimedia Foundation's Board of Trustees has appointed Katherine Maher as its new executive director.

Maher formerly served as communications officer for Wikimedia Foundation, the nonprofit that governs the massive online encyclopedia. She became interim director in March following a period of turmoil during which a board member and former Executive Director Lila Tretikov both...

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Independence Day: Resurgence: Like a high-budget porno, minus sex and fun

Heaven help us that we've reached this point: where the legacy of a blatant B-movie retread like 1996's Independence Day can be looked upon fondly, especially in light of a sequel. I have no interest in holding the original film up to some American Film Institute-level standard; the campy Roland Emmerich original is a classic because it knew its place as a piece of hyperbolic, chest-thumping...

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Real-time dynamics of lattice gauge theories with a few-qubit quantum computer

Gauge theories are fundamental to our understanding of interactions between the elementary constituents of matter as mediated by gauge bosons. However, computing the real-time dynamics in gauge theories is a notorious challenge for classical computational methods. This has recently stimulated theoretical effort, using Feynman’s idea of a quantum simulator, to devise schemes for simulating such theories on engineered quantum-mechanical devices,...

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Rates and mechanisms of bacterial mutagenesis from maximum-depth sequencing

In 1943, Luria and Delbrück used a phage-resistance assay to establish spontaneous mutation as a driving force of microbial diversity. Mutation rates are still studied using such assays, but these can only be used to examine the small minority of mutations conferring survival in a particular condition. Newer approaches, such as long-term evolution followed by whole-genome sequencing, may be skewed by mutational ‘hot’ or...

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The first gravitational-wave source from the isolated evolution of two stars in the 40–100 solar mass range

The merger of two massive (about 30 solar masses) black holes has been detected in gravitational waves. This discovery validates recent predictions that massive binary black holes would constitute the first detection. Previous calculations, however, have not sampled the relevant binary-black-hole progenitors—massive, low-metallicity binary stars—with sufficient accuracy nor included sufficiently realistic physics to enable robust predictions to better than several orders of magnitude. Here...

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