Scientists have finally figured out what causes blushing — and they cracked the code by intentionally placing their study volunteers in embarrassing situations.
In an unconventional new study, published July 17 in the journal Proceedings of the Royal Society B, researchers asked 40 teenage girls and young women to sing karaoke while being filmed. The study volunteers sang four notoriously difficult-to-sing tunes: "All I Want for Christmas Is You" by Mariah Carey; "All the Things You Said" by t.A.T.u.; "Hello" by Adele; and "Let It Go" from Disney's "Frozen."
