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Dudeney's 120-year-old dissection puzzle solution proves optimal

In 1907, the English author and mathematician Henry Ernest Dudeney posed a puzzle: Can any equilateral triangle be cut into as few pieces as possible that will fit together to form a perfect square? Four weeks later, he presented ...

Nessie loves a sunny summer's day—how anecdotes become data

New research from the University of St Andrews has used a database of Loch Ness Monster reports to translate anecdotes into data, shedding light on statistical biases and the importance of defining the right information for ...

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Mathematics
Risk it or kick it? Research analyzes NFL coaches' risk tolerance on fourth down
Mathematics
The butterfly effect: This obscure mathematical concept has become an everyday idea, but do we have it all wrong?
Mathematics
Spanish 'running of the bulls' festival reveals crowd movements can be predictable, above a certain density
Mathematics
Kids use different math skills at work vs. school, India study shows
Mathematics
Barbecue grill approach helps researchers understand puzzling Rayleigh–Bloch waves
Mathematics
Parents' math anxiety linked to lower numeracy skills in children
Mathematics
Scientists map the mathematics behind how we create and innovate
Mathematics
Simple mathematical model predicts development of cultural structures observed in human societies
Mathematics
Art analysis: 2D multifractal tools examine Jackson Pollock's expressionism
Mathematics
Mathematical technique 'opens the black box' of AI decision-making
Mathematics
English children lag behind in geometry, but parents can help them learn through play
Mathematics
Mathematicians develop new method to forecast natural phenomena and detect early cancer development
Mathematics
Historian explains how economics research stumbled under Soviet regime, while mathematics thrived
Mathematics
How does a hula hoop master gravity? Mathematicians prove that body shape matters
Mathematics
Researcher calculates Santa's speed on Christmas Eve—and this is what it would do to Rudolph's nose
Mathematics
Algebraic geometry offers fresh solution to data center energy inefficiency
Mathematics
How prepared are we for another pandemic? Study provides mathematical insights into airborne viral transmission
Mathematics
Can deep learning techniques predict sudden state transitions in nonlinear dynamical systems?
Mathematics
String figures shed light on cultural connections and the roots of mathematical reasoning
Mathematics
How much faster is a knight than a king? A mathematical study reveals the exact ratio

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Astronomy
Cosmic anomaly hints at frightening future for Milky Way
Cell & Microbiology
Scientists witness living plant cells generate cellulose and form cell walls for the first time
Evolution
Origin of life: How a special group of single-celled organisms laid the foundation for complex cells
Quantum Physics
An experimental test of the nonlocal energy alteration between two quantum memories
Plants & Animals
Two bees or not two bees? How wild bees feel the sting of honeybee competition
Social Sciences
A transition point in romantic relationships may signal the beginning of their end
Environment
New insights into formation of anthropogenic organic aerosols suggest greater region impact
Ecology
Insecticides may contribute to bigger problems with certain weeds
Quantum Physics
Wireless terahertz cryogenic interconnect minimizes heat-to-information transfer in quantum processors
General Physics
Scientists measure the spin-parity of charm baryons for the first time
Planetary Sciences
A NASA spacecraft will make another close pass of the sun
Condensed Matter
Cutting-edge experiments reveal 'hidden' details in transforming material with implications for faster microelectronics
Cell & Microbiology
Decoding a green alga's ciliary layer: Study reveals high‐resolution structure
Earth Sciences
Core samples from Greenland's seabed provide first historical overview of plastic pollution
Cell & Microbiology
How bacteria 'vaccinate' themselves with genetic material from dormant viruses
Nanomaterials
Core-shell nanocluster catalyst enables high-efficiency, low-cost and eco-friendly hydrogen production
Analytical Chemistry
High-pressure method can differentiate proton-coupled electron transfer mechanisms
Plants & Animals
Massive, long-lived trees discovered in the Tanzanian rainforest are a new species
Biotechnology
Computational drug discovery: Exploring natural products targeting SARS-CoV-2
Optics & Photonics
Compact solid-state laser system generates 193-nm vortex beam for the first time

New methods to improve the accuracy of cross-national surveys

Research by Social Statistics has highlighted new methods to improve the accuracy of cross-national surveys. Cross-national surveys run the risk of differential survey errors, where data collected vary in quality from country ...

AI can teach math teachers how to improve student skills

When middle school math teachers completed an online professional development program that uses artificial intelligence to improve their math knowledge and teaching skills, their students' math performance improved.