Previous analysis indicates that Earth endured a roughly 200–300 year long ice age starting around 540 CE. Scientists believe that powerful volcanic eruptions that hurled massive amounts of ash ...

Toys made in China have been exempt from tariffs since President Donald Trump’s first term. That is no longer the case. Last month, Trump raised tariff rates on China to 20%, dealing a big blow ...

A person's chronological and biological ages may differ. Chronological age is the number of years a person has been alive, while biological age refers to how old their cells and tissues are based on ...