Have you ever seen a mug that changes colour once a hot drink is poured in? Or a ring that is said to change colour with your mood? Both of these items use thermochromic materials. These substances ...

Both of these items use thermochromic materials. The colour of these substances is affected by changes in temperature. This effect is usually reversible, meaning the material returns to its original ...

Ryan from Toronto, Canada was pranked by a friend from all the way across the country with a hilarious colour-changing mug. His friend Kyle sent a black mug in the post that changes into a picture of ...