Methylene blue is a synthetic compound with a deep blue color that has been used for over a century in various medical, ...

A video of Robert F Kennedy Jr showing him adding a mysterious bright blue substance to his drink led to controversy and curiosity on social media ...

A capped 2-liter plastic bottle containing a clear, colorless liquid is shaken. The liquid turns a deep blue ... when the bottle is shaken and allowed to sit. OPTIONAL: Several bottles can be prepared ...