Whether at a birthday party in Brazil, a funeral in Kenya, or protests in Hong Kong, humans all use variations of the same facial expressions in similar social contexts, such as smiles, frowns, ...

Simplify \(\frac{3t + 6}{3t}\). The numerator of this fraction will factorise as there is a common factor of 3. This gives \(\frac{3(t + 2)}{3t}\). Now, there is clearly a common factor of 3 between ...

Cats can use hundreds of facial expressions to communicate, a new study reveals. Over the course of a year, researchers recorded a total of 276 distinct facial expressions used among a colony of 50 ...