An apparently easy-looking math problem has left internet users scratching their heads. Give it a try to see if you can ...

The proof, known to be so hard that a mathematician once offered 10 martinis to whoever could figure it out, uses number ...

Given every two years to a sample of America’s children, the National Assessment of Educational Progress is considered one of ...

Heart failure (HF) is a complex clinical syndrome occurring as a consequence of a reduced ability to pump blood under normal preload condition. It is a worldwide global pandemic, with increasing ...