A Greek researcher says a piece of purple-and-white fabric discovered decades ago in a tomb in northern Greece may have belonged to Alexander. Others disagree.
A colour-changing fabric can provide heating or cooling ... causing the colour to change — from white and reflective at higher temperatures to black and heat-absorbing at lower ones.
Do you want to learn more about the vibrant history of the White House? Browse our site through curated collections or content type. Have a topic you’d like to know more about? Search our site by some ...