Your heart doesn’t know when you'll get married or how much you'll receive in tax returns, but findings from a recent study show that people's tickers can anticipate certain events without any cues. Researchers from Northwestern University in Evanston, IL, the University of California, Irvine, and the Università di Padova in Italy showed subjects a series of images in an unpredictable order and studied their reactions. Some images were neutral; others were meant to illicit an excited response. The scientists discovered a quickened heart rate as much as 10 seconds before the presentation of a stimulating image, suggesting that hearts can sense when something thrilling or disturbing is about to happen. So listen to your heart!