Robert F. Kennedy Jr. is going viral on social media after he was caught on camera adding a mysterious blue liquid to his in-flight beverage, and internet sleuths believe they know what it is.

A recent viral video of Robert F. Kennedy Jr. using a bright blue liquid sparked widespread curiosity about methylene blue—a substance that has been making waves on social media as a supposed ...

This blue liquid is your indicator solution for the chemistry experiment. Next, pour about 1 tablespoon of the indicator into each of three clean clear plastic cups. Add 1 drop of lemon juice to the ...