Most of us have little trouble working out how many milliliters are in 2.4 liters of water (it's 2,400). But the same can't be said when we're asked how many minutes are in 2.4 hours (it's 144).

A new collection of research papers examines how humans conceptualize numbers and the numeral systems we’ve build around them ...

Phonons are sound particles or quantized vibrations of atoms in solid materials. The Debye model, a theory introduced by ...

String theory unifies all the forces of nature. Forces that seem very different, such as gravity and electricity, are deeply ...

In this excerpt from the new book 'Speak Data,' the Wharton professor and best-selling author shares his thoughts on how we ...

November 11, 2025 • The World Cup is coming up, and it’s going to cost a pretty penny if you are hoping to attend. Today on the show, we talk to NPR Senior Business editor and World Cup superfan about ...

Every animal and plant needs food to live, and they are all part of a food chain. A food chain shows how animals obtain their food. A food chain also shows the flow of energy, which starts off at the ...

Around 2,500 years ago, the city of Rome was at the centre of a huge empire that stretched from Scotland to Syria. The Roman Empire was based upon enslaved people and citizens. Enslaved people were ...