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

The eighth round of Premier League fixtures has now come to an end with Manchester United's 2-1 win over Liverpool being the major surprise of the weekend. Harry Maguire's 84th-minute winner upset the ...

The Price to Earnings (P/E) ratio, a key valuation measure, is calculated by dividing the stock's most recent closing price by the sum of the diluted earnings per share from continuing operations for ...

Body mass index (BMI) alone may not be enough to measure someone's risk of cardiometabolic disease, according to researchers at UTHealth Houston. Subscribe to our newsletter for the latest sci-tech ...

A common height that seems normal in our human-scale world. Yet, when we compare it to the smallest and largest conceivable distances in ...

Canadian Prime Minister Mark Carney has said his country is prepared to resume trade negotiations with the US "when the Americans are ready". His remarks come after US President Donald Trump announced ...

Find out how GDP can help measure the health of a country’s economy Michael Boyle is an experienced financial professional with more than 10 years working with financial planning, derivatives, ...

Julia Kagan is a financial/consumer journalist and former senior editor, personal finance, of Investopedia. Andy Smith is a Certified Financial Planner (CFP®), licensed realtor and educator with over ...

Magnitude scales can be used to describe earthquakes so small that they are expressed in negative numbers. The scale also has no upper limit. Learn more about how we measure earthquake magnitude.