The Strange Physics of Tea Leaves Floating Upstream - Facts So Romantic

It's been said that the true harbinger of scientific discovery is not "Eureka!" but "Huh… that's funny…." That certainly proved to be the case for Sebastian Bianchi: a simple cup of tea led him to some intriguing, counter-intuitive insights into the surface tension of water. Preparing mate involves pouring hot water over mate leaves packed into a cup and letting them steep. Generally, things tend to flow downstream, yet he found a few mate leaves inexplicably ended up back in the kettle. Somehow, they had traveled upstream.