Two mathematicians have proved that a straightforward question—how hard is it to untie a knot?—has a complicated answer.

Third-party funding of high-stakes litigation can often make the difference between litigating the case or walking away.  The financial arrangement often makes good sense, with investors helping to ...

The authors used a Bayesian modeling framework to fit behavior and serotonin neuron activity to reward history across multiple timescales. A key goal was to distinguish value coding from other ...

1. Fast and Slow Piles. This works well as a starting or closing activity. Students sort math fact cards into fast and slow piles. This visual way of tracking facts highlights which facts come ...

Will Kenton is an expert on the economy and investing laws and regulations. He previously held senior editorial roles at Investopedia and Kapitall Wire and holds a MA in Economics from The New School ...

Julia Kagan is a financial/consumer journalist and former senior editor, personal finance, of Investopedia. Khadija Khartit is a strategy, investment, and funding expert, and an educator of fintech ...

Physics is the search for and application of rules that can help us understand and predict the world around us. Central to physics are ideas such as energy, mass, particles and waves. Physics attempts ...

Unlike the romantic weddings of today, marriage in ancient Rome was an arrangement between two families. Like much of Roman society, it was highly structured but also logical and, in some ways, even ...