It's in the embrace of acidic soils, boasting a pH value below 5.5, that you'll find hydrangeas showing off their blue moods, whereas a soil pH floating between 6.5 and seven is the sweet spot for ...

The optical illusion involves a series of 1,000 dots ranging from very blue to very purple. In the study, researchers asked participants to judge whether each dot was blue.

While purple hair would be cool, it seems Jungkook's hair is really blue, after all. Another ARMY said Jungkook wasn't using the same filter the other fan thought. "jk could've used any filter ...